First Holes, bases 300..399.
The smallest exponent is 71. (30071 - 1 c152, 30371 - 1 c150, 30671 - 1 c160, 30671 + 1 c140, 30971 - 1 c170, 30971 + 1 c175, 32071 - 1 c155, 32271 + 1 c152, 32371 - 1 c160, 32371 + 1 c151, 32671 + 1 c156, 32971 + 1 c173, 33371 - 1 c147, 33571 - 1 c168, 34071 - 1 c164, 34171 - 1 c166, 34271 - 1 c167, 34571 + 1 c152, 34671 + 1 c160, 35171 + 1 c167, 35571 + 1 c179, 35771 - 1 c157, 36371 - 1 c165, 36471 + 1 c147, 36571 + 1 c180, 36971 + 1 c164, 37071 + 1 c157, 37171 + 1 c166, 37471 + 1 c140, 37571 + 1 c173, 37871 + 1 c171, 37971 + 1 c168, 38071 - 1 c172, 38171 + 1 c173, 38471 + 1 c177, 38571 - 1 c162, 39271 + 1 c157, 39671 - 1 c182, 39871 - 1 c171, 39871 + 1 c159, 39971 - 1 c168).
The smallest first hole is 36273 - 1 c138.
For some bases the first hole is beyond the table limit (255 decimal digits).

30071 - 1 13.23.12781.24709.4374311.16316653.c152 30092 + 1 1289.8017.1010353.1442894881.35285561321.11731216235033.159916197077783089.c165 30183 - 1 22.3.52.43991.c199 30176 + 1 2.41.127681.100104161.3864295697.c164 30279 - 1 7.43.29550109.12380741733227656309.c167 30276 + 1 73.880993.113947529.1248928126777.10790304658729.c148 30371 - 1 2.151.853.21727.31606863643268219.c150 30374 + 1 2.5.1481.7549.9181.126097.393710019877.c155 30483 - 1 3.101.167.2216101.2852711.47618797380877.c175 30479 + 1 5.61.33181.8212614991063981.c174 30583 - 1 24.19.6143.11991878513.11548793867204285386829063.c165 30583 + 1 2.32.17.167.499.1163.756632004628985293919354068871.c166 30671 - 1 5.61.811957.277023541.c160 30671 + 1 307.853.18248426824602667919072102289629.c140 307107 - 1 (Beyond table range) 30776 + 1 2.761.33937.130873.760913.1603071980478113.c156 30873 - 1 307.1514070546953.c167 30873 + 1 3.103.293.76943.2106343.192393492901.67654277699909.c141 30971 - 1 22.7.11.81083.c170 30971 + 1 2.5.31.c175 31079 - 1 3.103.317.6733171.11138053.2278211797.187164918265189.120578569132608611.c138 31074 + 1 17.149.5653.139861.c173 311101 - 1 2.5.31.607.5028791.33371672618654722579196985596643209483613180773.c194 31194 + 1 2.137.353.435221.1428613.259863941.86787772733.6710627186293.35482545684629.c172 31283 - 1 311.1578389091530384527373717.c181 31279 + 1 313.15959.c191 313107 - 1 (Beyond table range) 31394 + 1 2.5.97.101.39293.32247829.2267617273.8333830092075557.60698170176138569.c176 31473 - 1 313.15331.9678857863.c166 31488 + 1 353.881.8161.39841.49169.341617.5911153.6484551285822671898805688897.c161 31579 - 1 2.157.80897.c190 31586 + 1 2.49613.100621.4750297.40709240017.204754007677304359359473.c165 31683 - 1 32.5.7.7428030235124387489.c187 31673 + 1 317.192327991.1379120819.469606411514171.c148 317109 - 1 (Beyond table range) 31783 + 1 2.3.53.950934487.7612056656888797.123325193936955764409011.c158 31883 - 1 317.1163.c203 31879 + 1 11.29.2213.4683778861.c183 31979 - 1 2.3.53.9007.4968563406839643763.c173 31989 + 1 26.5.179.129763.435923.5116967.3767007775288254705645325212061339223593.c162 32071 - 1 11.29.456346465794368017031.c155 32074 + 1 13.7877.35972349008413.c167 32179 - 1 26.5.121617163223123.c182 32182 + 1 2.51521.46438259989245800903535527621300433071837.c160 32279 - 1 3.107.94169.329431.c186 32271 + 1 17.19.175939.810588967.24267160433.c152 32371 - 1 2.7.23.30851773.207352661.c160 32371 + 1 22.34.2699.12176395492321763675321.c151 32573 - 1 22.34.9491.3501811.7359277.c164 32579 + 1 2.163.c196 32679 - 1 52.13.35300478676171.c183 32671 + 1 3.109.2131.8503529.25287762571.c156 32773 - 1 2.163.c182 32774 + 1 2.5.172.372.23535257.c173 32891 - 1 3.53.109.157.743.6761.1681048871951.27645583300190447947681.353944104267272558707360884101.c152 32874 + 1 5.7993.21517.664669.221433023101.11715149872818137.c145 32973 - 1 23.41.293.5415614209.c170 32971 + 1 2.3.5.11.7669.c173 33073 - 1 7.47.14581459.160135501878339943.c157 33073 + 1 293.331.439.748981.1123909.c165 331119 - 1 (Beyond table range) 33194 + 1 2.29.1889.2633.4249273803275241276973901.c204 33273 - 1 293.331.c180 33274 + 1 52.149.4409.1760667679775044553.c162 33371 - 1 22.83.48196576279.9483996145058588173.c147 33373 + 1 2.167.3410706281064601.c167 33489 - 1 32.37.179.91928813.c212 33473 + 1 5.67.185256855132023980044228566367581443.c147 33571 - 1 2.167.1463437091.c168 33583 + 1 24.3.7.79847.1614045889.25537489785078442933.342598409832532536078929149.c148 33695 - 1 52.67.571.119701.27551597.2556710621.108456275445814479845599768482914003957.c175 33683 + 1 337.18427.720607.1331737132305953492299.224730511042932405344916735286819.c144 33791 - 1 24.3.72.79.239.1158868517.878160882719.62430631782774529.23506511281974862727.c166 33774 + 1 2.5.41.277.919081.c177 33897 - 1 337.4657.541453825105244606783.c219 33883 + 1 3.113.499.5873081.c198 33983 - 1 2.132.400986215925661.1846564707621550993462609.c169 33974 + 1 2.372.149.1553.1777.2221.59053.76860101.713859353.75685973821.c140 34071 - 1 3.113.7669.12502838863.c164 34079 + 1 11.31.3559741.c191 34171 - 1 22.5.17.7243.61880477.c166 34173 + 1 2.32.19.439.c180 34271 - 1 11.31.26111546603.c167 34292 + 1 17.41.1433.13697.60169.1334737.330144083617.c201 34479 - 1 73.73471.c193 34482 + 1 17.6961.4520497.c197 34583 - 1 23.43.167.499.574838847960323898586375743512267572044199.c162 34571 + 1 2.173.1279.150594612938021265485473.c152 34673 - 1 3.5.23.293.125269.933671.1816679.c164 34671 + 1 347.853.9941.303533788097.c160 34791 - 1 2.173.443.3797.72073.1376467.39577763.44236319.1817032729376806915002511.3104391407690541454645050893.c145 34783 + 1 22.3.29.167.921467.c201 34879 - 1 317.347.3793.1719523966527599716124449.c168 34883 + 1 349.16608799.2717548690217983.129293521508748284964561365108100077.c151 349101 - 1 (Beyond table range) 34985 + 1 2.53.7.11.953.25841.268965391.22239828979.118040597827.124000147881151.19306718734026833.c145 35089 - 1 179.349.3739.236207.2341625117621.1133709701243513987051.c180 35073 + 1 33.13.c184 35173 - 1 2.52.7.90056947861.c173 35171 + 1 25.11.374753463943.c167 35273 - 1 33.13.293.3067.6863.164751717078069840731442613.c148 35282 + 1 5.2297.13121.24781.1710715445467043724849060434293984913.c161 35395 - 1 25.11.191.571.4201.17443.23827.3706621.22644619.48358991.27951674883065707517.601605556569895155738778597760081.c149 35376 + 1 2.761.2281.44537.2257961.92761649.7763701441.c159 35483 - 1 353.c210 35476 + 1 433.6952481.36268129.498805681554138333833953178681.c147 35573 - 1 2.3.59.439.28135634808169074104911607.c156 35571 + 1 22.89.c179 35697 - 1 5.71.69217279453338782538763548577645644883.c208 35682 + 1 13.9749.376617301987417775953.1492854168580058613752148769.c157 35771 - 1 22.89.15053.14763031.29179788031.c157 35774 + 1 2.52.149.2549.3701.37889.c174 35883 - 1 3.7.17.167.4421909.653222798933.48290869036456489251375117588981751368140339.c146 35889 + 1 359.1069.5519.884904929.563968488262890967.c192 35979 - 1 2.179.317.1924283.1319892800399081.366269321409491813615973533.c149 35973 + 1 23.32.5.123592213.c176 36073 - 1 359.214016142729608893915206567202307403204072319.c140 36073 + 1 192.293.6863.683704277.3268685123347655830103.c148 36273 - 1 192.293.433372140347745413072046004374786436788760351.c138 36279 + 1 3.112.85945446512657.c186 36371 - 1 2.181.6959.47407589773.c165 36382 + 1 2.5.821.13177.146617.4999066114129.21346792233500183453.58066683950849850626353.c142 36479 - 1 3.112.2213.913873.c191 36471 + 1 5.73.26981.5914671837367.10012494349808117.c147 36589 - 1 22.7.13.7796935762379.c213 36571 + 1 2.3.61.c180 36679 - 1 5.73.317.49297.2781433.5164547.949106159.98760239744572733.c154 36679 + 1 367.c200 36797 - 1 2.3.61.8197471.2614694616554314616807623.446473002191299647227861063.c189 36782 + 1 2.5.13469.670597.9080619157.2111140042961.216573670348897.c163 36879 - 1 317.367.1423.9007.165901.1088621.c180 36879 + 1 32.41.2371.307627.46602733.c184 36973 - 1 24.23.1607.29201.9146609.300619841.c162 36971 + 1 2.5.37.853.10333387719953.c164 37083 - 1 32.41.167.c209 37071 + 1 7.53.195540005039.1075238263901.c157 37179 - 1 2.5.37.317.1423.344996999297.c184 37171 + 1 22.3.31.207398096420891.c166 37273 - 1 7.53.3172113736591.c173 37273 + 1 373.52561.2611069403.50765093064441906802789838817253.c140 373101 - 1 (Beyond table range) 37379 + 1 2.11.17.1795987.1796777.432743974097.2536411464129553.c162 37479 - 1 317.373.3319.396107.1476481087.c180 37471 + 1 3.53.1847.250489.1038616680877.77295162491277144929.c140 37589 - 1 2.11.17.179.592919.1011734023.1161348621281209.c195 37571 + 1 23.47.119881939.c173 37689 - 1 3.53.40763.34194869.8282326530828426875951672369483.126280579395818407322404011451052506571.c146 37673 + 1 13.29.293.439.9929.c177 37773 - 1 23.47.293.1607.c180 37773 + 1 2.33.7.689267.3973456577.c171 37879 - 1 13.29.1423.5531.39282473143079.185794259379269.151474552804727237.c150 37871 + 1 379.21017.204481.c171 379101 - 1 (Beyond table range) 37971 + 1 22.5.19.853.12923.341227.c168 38071 - 1 379.33797.46861.c172 38073 + 1 3.127.293.176219227.c176 38189 - 1 22.5.19.18837124477.12028506329500510663584475095892329994871819546689.c168 38171 + 1 2.191.2273.77249.c173 38279 - 1 3.127.317.c199 38273 + 1 383.18828106428012097.66915772854104957.c153 38379 - 1 2.191.2056382774617.15371978121006197.199461950591606214114480037.c147 38374 + 1 2.5.14669.731085157299285601689575057.c160 38473 - 1 293.383.3797.4582704649.c171 38471 + 1 5.7.11.9941.c177 38571 - 1 27.3.33001410850039694641.c162 38576 + 1 2.641.5477777.17137793.215010617799774502629571343497537.c148 38685 - 1 52.7.11.61.5861.12451.18191.332011.733450784056404508718016356720954557.c162 38674 + 1 1481.148997.c184 38773 - 1 2.193.293.25819198662139.c171 38773 + 1 22.97.c187 38879 - 1 32.43.758627521.6380815781.c184 38873 + 1 389.877.572558241809487292211.c163 389101 - 1 (Beyond table range) 38974 + 1 2.29.149.2609.7741225976753.c172 39073 - 1 389.2329577.c181 39089 + 1 17.23.179.3739.22073.11297173011937.1124958640228440336017.c184 39173 - 1 2.3.5.13.439.3359.258142309.741050272801.c161 39186 + 1 2.173.76441.294293.344135719260120854905469.13500598967559101132652776912209344487049.c147 39283 - 1 17.23.167.9463.c207 39271 + 1 3.131.473240561.17457291512491561.c157 39389 - 1 23.72.49307.163547291.1446655129.c207 39373 + 1 2.197.48619.7167287.c176 39497 - 1 3.131.389.3881.74724928745842390218286109806192759039.1000446606449320845814408612947275017043.c167 39476 + 1 22481.1071937.c187 39573 - 1 2.197.c187 39576 + 1 2.193.5737.10993.9066193.128012890337.c169 39671 - 1 5.79.c182 39674 + 1 149.156817.18980912979257.853701885927037167751453.c148 397101 - 1 (Beyond table range) 39774 + 1 2.5.149.15761.61717.73101859781.85331761539120825049177.c147 39871 - 1 397.7243.106113619.c171 39871 + 1 3.7.19.2131.2404771.190393249498987.c159 39971 - 1 2.199.569.1497263529263.c168 39973 + 1 24.52.c188