First Holes, bases 200..299.
The smallest exponent is 71. (21471 + 1 c158, 21771 - 1 c161, 22271 - 1 c165, 23271 + 1 c166, 23471 - 1 c166, 23471 + 1 c161, 23571 - 1 c163, 23871 + 1 c167, 24271 + 1 c156, 24471 - 1 c168, 26171 + 1 c158, 26771 - 1 c158, 26771 + 1 c164, 26871 + 1 c156, 27871 + 1 c155, 28771 + 1 c168, 28871 - 1 c167, 29271 - 1 c161, 29271 + 1 c167, 29571 + 1 c168, 29771 + 1 c165, 29871 + 1 c155).
The smallest first hole is 23674 + 1 c154.
For some bases the first hole is beyond the table limit (255 decimal digits).

20095 - 1 191.199.457.647.3079.3361.6689.478441.2763209.55901904577.280081959593.c164 20076 + 1 1889.4561.847009.13297873.c155 20189 - 1 23.52.179.c201 20197 + 1 2.101.971.68483.c214 20297 - 1 3.67.1798539469.2955641411.346000711523240531.c186 20274 + 1 5.8161.1374245713.c157 203109 - 1 2.101.116849.4000200736444802046569.c223 20379 + 1 22.3.17.48037294014023154936775643.c155 20489 - 1 7.29.179.1069.53883928822462222384695028815237649.c164 20482 + 1 27061.41617.c181 20597 - 1 22.3.17.18241627.2069262385178239.c200 20583 + 1 2.103.169321.74435743937.30306683398303673.c157 20697 - 1 5.41.389.1284480307688172965182640240908771155527329831343.c172 20682 + 1 42437.c186 207107 - 1 2.103.9831589.28162187.87106133.c224 207101 + 1 24.13.154524749.24749800652009.15830171508971376238552691.c185 20897 - 1 32.23.389.971.728471.c212 20879 + 1 11.19.43358544071.5419659119843.c158 209103 - 1 24.13.619.8274112876049121071.c215 20979 + 1 2.3.5.7.381097.5447758157.c166 21089 - 1 11.19.179.106801.21603675059.c187 21083 + 1 167.211.226708128851705680419929062898483.c156 211109 - 1 2.3.5.7.71069.4520827056439.27628893308622919992252584685972018131.c197 21197 + 1 22.53.389.3299.3270419021.c208 21279 - 1 211.317.c179 21294 + 1 5.89.101.7333.304937.1568298023069.33660323279775854240629.c170 213101 - 1 22.53.1213.142696639.c222 21392 + 1 2.17.60539593.c205 21489 - 1 3.71.142485263.9106923043.1025762770883888201.c169 21471 + 1 5.43.197381.c158 21589 - 1 2.107.179.12052850989.c193 21574 + 1 2.29.149.797.c166 21771 - 1 23.33.2131.c161 21779 + 1 2.109.317.8849.295777.c171 21883 - 1 7.31.c192 21892 + 1 32353.69809.7424033.81309233.116663976393247937.c174 21979 - 1 2.109.3793.464047.802736746609904933.c156 21986 + 1 2.173.23981.16303193.376328459430637349261.c167 22097 - 1 3.73.2005788311.c216 22074 + 1 29.149.1669.c167 22179 - 1 22.5.11.317.c181 22176 + 1 2.233.281.18217.c169 22271 - 1 13.17.c165 22279 + 1 223.17789063.c176 223109 - 1 (Beyond table range) 22389 + 1 25.7.179.169457.271273.7074830230683249049121.c172 22497 - 1 223.622547.979009759753194977819923.c196 22474 + 1 149.50177.c168 22697 - 1 32.52.170749437780591619179250660314601.74502979187800995366587996562868347253.c156 22697 + 1 227.10353781.c219 227109 - 1 (Beyond table range) 227101 + 1 22.3.19.1213.36056164633606916839.5342357880107766369707045106880761569.c177 22889 - 1 179.227.773046146641.c194 22889 + 1 229.1069.4451.1142543958197.c189 22991 - 1 22.3.19.673.1647127.2377883.2549951.1007135221.2091592231.215227848907.c161 22976 + 1 2.17.73.1108001.c170 23083 - 1 167.229.499.15107.c185 23074 + 1 52901.71633.c166 23197 - 1 2.5.23.76631.c223 23174 + 1 2.26681.141623106241.c160 23283 - 1 3.7.11.167.18767629.141664069.c177 23271 + 1 233.c166 23383 - 1 23.29.167.5479.9976103.c182 23386 + 1 2.5.61.89.68653457.4041281653697.1351568273398172201.c161 23471 - 1 233.c166 23471 + 1 5.47.311407.c161 23571 - 1 2.32.13.1279.c163 235101 + 1 22.59.c238 23679 - 1 5.47.c186 23674 + 1 149.55697.13197161.315497521.c154 23783 - 1 22.59.1993.284066617314628339.c174 23779 + 1 2.7.17.260479907.c177 23883 - 1 3.79.256471.7542475221782107391244421729.c162 23871 + 1 239.c167 239115 - 1 (Beyond table range) 23991 + 1 24.3.5.71.157.65599.370483.7055819.816178091.3358648841627030875951.c163 24089 - 1 179.239.788065097.c199 24083 + 1 167.241.1163.523891120740124727797307.c167 241113 - 1 (Beyond table range) 24186 + 1 2.113.173.257.3458990860236204192593.c177 242101 - 1 241.607.809.8951636883088577866761246031.1573268756586340756396891833496854035125665073127.c157 24271 + 1 35.569.533948969.c156 24471 - 1 35.c168 24479 + 1 5.72.c187 24589 - 1 22.61.179.2150419.862409579921.c190 24579 + 1 2.3.41.10903.c183 24689 - 1 5.72.179.1069.3739.770741.4300837.16763863.21294853.c175 24686 + 1 73.829.49537.93913.165293.8547541.714985253.c171 24797 - 1 2.3.41.15739008541.c220 24786 + 1 2.5.173.2753.6101.293054633.332722635871210653144166829.c161 24883 - 1 13.19.167.550153286219.c183 24879 + 1 3.83.36964021001.c177 249101 - 1 23.31.1213.98981.c232 24998 + 1 2.29.197.1069.29009.702713849741.3818388043793.80836341039299861.c182 25079 - 1 3.83.5369710561199.c175 25083 + 1 167.251.499.37517.358727.c182 251107 - 1 (Beyond table range) 25188 + 1 2.1553.14517809.349371313.1905868024181617.347098788432996165207137.c154 25289 - 1 251.43789.140373293.2923428475067378183.c181 25276 + 1 337.761.5420321.11966641.154178009.c156 25397 - 1 22.32.7.2646937.c225 25388 + 1 2.353.8369.285121.1018337.1563281.1817393.c181 25483 - 1 11.23.167.49222399349.c185 25492 + 1 12329.4162314257.1214847036828132664000585417.c181 25583 - 1 2.127.167.5479.1266913.c186 25586 + 1 2.13.41.61.173.673553.1034581.c189 25783 - 1 28.997.164341.274612538567.608700984816324017.c161 25783 + 1 2.3.43.167.114043.453423001426849134418287177451.c161 25879 - 1 257.c189 25882 + 1 5.13313.33570888172167864275487621113.c165 25989 - 1 2.3.43.179.3206537562661.c198 25986 + 1 2.17.1732.1033.1973.6036857.c189 26083 - 1 7.37.167.9257821.299713836973.310998687953.c166 26079 + 1 32.29.317.10429.17539.148783387.300689302244543.c155 261107 - 1 (Beyond table range) 26171 + 1 2.131.8663.19237451.c158 26289 - 1 32.29.179.4273.18691.80652409892268859.c186 26274 + 1 5.1777.2221.13729.c168 263111 - 1 (Beyond table range) 26386 + 1 2.5.1721.6917.31647896113.c190 26479 - 1 263.317.151413573435089998115661479597.c158 26483 + 1 5.53.1671289.183110783.c185 26589 - 1 23.3.11.45147209.607928029.c197 26579 + 1 2.7.19.3793.49613.c181 26697 - 1 5.53.80946889.7084073420363.22330419728797.c199 26679 + 1 3.89.317.34919.c183 26771 - 1 2.7.19.17041.48424273.c158 26771 + 1 22.67.569.2273.c164 26895 - 1 3.11.89.191.881.534311.6691231.51056357190057853206116218246927896526470493.c166 26871 + 1 269.853.2131.438560753.c156 269103 - 1 22.67.2285159.42365975657.43618084651.67618588451.77581120327999.c196 26979 + 1 2.33.5.48823.c185 27083 - 1 269.997.c197 27076 + 1 17.73.113.457.37897.c173 27195 - 1 2.33.52.191.229.251.571.4561.102031.4313591.287967501587.1656676429800850222141055933.c165 27183 + 1 24.17.167.44987.901512137.10311910484345094217.c165 27289 - 1 179.271.3739.5907126146923.c196 27274 + 1 5.14797.144292009.23744424401.c157 27397 - 1 24.17.4747716023.c225 27383 + 1 2.137.167.197677536811.c187 27485 - 1 3.7.13.5657051951.1012970786897053704490892251488687681551.c157 27482 + 1 193.389.472618133639053.c181 27589 - 1 2.137.1668929.10039183690327381620177958454794847373293.c169 27583 + 1 22.3.23.16166243.c193 27679 - 1 52.11.2371.5689.7390451.8092514738339.c164 27689 + 1 179.277.41800987.97757544471307079.127287141198346961475978713.c162 277101 - 1 22.3.23.6263.21746868351029.313260050777606862179.c207 27776 + 1 2.569.5173409.75347617.c168 278101 - 1 277.80328322724567.292703605255533038233.c211 27871 + 1 32.31.569.7243.3715764979.c155 27995 - 1 2.11.139.421.631.647.1483.1901.2081.1124169951071.109746236137318895301353780344987250381.c161 27979 + 1 23.5.7.317.15643.27809.24158598125083.c167 28089 - 1 32.31.179.1069.6962471.6060094373.9746875881631843.c178 28082 + 1 78401.c196 281107 - 1 (Beyond table range) 28179 + 1 2.3.47.317.160527527.c181 28279 - 1 281.186283.c186 28276 + 1 73.86631049.c177 28389 - 1 2.3.47.975263.32291469022427.17367302921188002464339473.c172 28374 + 1 2.5.149.8009.34337.c170 28483 - 1 283.c202 28474 + 1 149.80657.436505429.c166 28589 - 1 22.71.179.23497.35067650158187581073.c190 28592 + 1 2.433.1657.2441.3121.329752523245841.2430190289730634033.24768922145777457329497.c158 28683 - 1 3.5.19.109229.491081287.c188 28679 + 1 7.41.317.56056790014258667.c173 28779 - 1 2.11.13.21647.3093824387.c178 28771 + 1 25.32.55807.c168 28871 - 1 7.41.569.1847.c167 28889 + 1 172.179.11393.58825656093188507.c194 29089 - 1 172.2033451830008829813506670798571685142561.c178 29082 + 1 37.821.2273.2356185674153.c182 291107 - 1 (Beyond table range) 29189 + 1 22.73.179.3917.6747780997.857073647533993.c187 29271 - 1 3.97.2557.240085649.c161 29271 + 1 293.3705917.c167 293107 - 1 (Beyond table range) 29382 + 1 2.52.17.101.1706038668803551739149.c177 29491 - 1 293.313.547.129403.598079.23380267.28751399.77747387078947.647983119867091.c163 29479 + 1 5.59.317.7901.22632013589351461410104911.c161 295101 - 1 2.3.72.106657.1047421081963.186687143854735373.30396290248868641977743.10033920853147736539516841574829957.c157 29571 + 1 23.37.766091.c168 29697 - 1 5.59.19207.49066481.874228991.60288279576471427004096232919261.c185 29676 + 1 457.7676563457.10697467097.c166 29789 - 1 23.37.342720311.c210 29771 + 1 2.149.29537.30389.c165 29889 - 1 33.11.1136282047.2195215166042875491481959267783962799481.c170 29871 + 1 13.23.23857.7626253.32752301.c155 29983 - 1 2.149.167.997.196299841799850847.2410402736084401874671.c160 29976 + 1 2.761.23633.169097.9455161.3012510497.c159