(1011-1)/9 + 8*1010 + 8*105 + 8
(1017-1)/9 + 8*1016 + 8*108 + 8
(1061-1)/9 + 8*1060 + 8*1030 + 8
(1095-1)/9 + 8*1094 + 8*1047 + 8
(10119-1)/9 + 8*10118 + 8*1059 + 8
(10139-1)/9 + 8*10138 + 8*1069 + 8
(10169-1)/9 + 8*10168 + 8*1084 + 8
(101913-1)/9 + 8*101912 + 8*10956 + 8 Using Pari/gp (+/- 24 min 46s) gp > default(parisizemax,"1G") gp > isprime((10^1913-1)/9+10^1912*8+10^956*8+8) *** isprime: Warning: increasing stack size to 512000000. %1 = 1
(102323-1)/9 + 8*102322 + 8*101161 + 8 Proven by certificate by Masaki UKAI (August 22, 2022) http://factordb.com/index.php?id=1100000002736129756
(1011011-1)/9 + 8*1011010 + 8*105505 + 8
(1012539-1)/9 + 8*1012538 + 8*106269 + 8
(1018583-1)/9 + 8*1018582 + 8*109291 + 8