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Old 2020-10-22, 18:06   #7
Batalov
 
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"Serge"
Mar 2008
Phi(4,2^7658614+1)/2

100100011101002 Posts
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Code:
-----  -------------------------------- ------- ----- ---- --------------
 rank           description              digits  who year comment
-----  -------------------------------- ------- ----- ---- --------------
11538  10^388080-10^112433-1             388080   CH8 2014 Near-repdigit (**)
11539  10^388080-10^180868-1             388080  p377 2014 Near-repdigit
11540  10^388080-10^332944-1             388080  p377 2014 Near-repdigit
11541  10^388080-10^342029-1             388080  p377 2014 Near-repdigit
12104  10^376968-10^188484-1             376968  p404 2018 Near-repdigit
12949  10^360360-10^183037-1             360360  p374 2014 Near-repdigit
18009  10^277200-10^99088-1              277200  p367 2013 Near-repdigit
18010  10^277200-10^178231-1             277200  p367 2013 Near-repdigit
18011  10^277200-10^257768-1             277200  p372 2013 Near-repdigit
37645  10^134809-10^67404-1              134809  p235 2010 Near-repdigit, palindrome
41256  10^104281-10^52140-1              104281   p16 2003 Near-repdigit, palindrome
45524  10^100000-10^61403-1              100000   p62 2001 Near-repdigit
...
https://primes.utm.edu/primes/search.php
Mathematical Description: ^10^%-10^%-1
Type: all
Maximum number of primes to output: 300

There was an archived project - https://mersenneforum.org/forumdisplay.php?f=107
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