10000...00001 (6867-digits)
This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).
This 6,867-digit number is the largest known trinomial
emirp of the form 10^x + c·10^y + k. Discovered by Yuri
Ganda (Project LEVIATA) in April 2026, it is part of a
catalog of 268 such emirps. Both this number and its
decimal reverse are probable primes (Miller‑Rabin, error
< 4^-25). ECPP certification via PARI/GP and Primo has
been completed. Registered at The Prime Pages (prover ID
6066) and Factordb. [Ganda]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Reginald McLean