88888...88887 (2691-digits)
This number is a prime.
Largest known near-repdigit-prime with 8 and 7. 2690 eights ending with one seven. Proven (1-11-02) by the 'PRIMO' program with an AMD Athlon 1.4 MHz computersystem, taking about 134 hours of dedicated computingtime. [Bakker]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell