10010...11111 (207-digits)

This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).

   1001010 1110101110 1011101111 1010111110 1110101110 1111101111 1010111110
1110101111 1011101111 1011111110 1110101110 1011101111 1111111110 1110111110
1011111111 1010111110 1111101110 1111101111 1010111111 1110101110 1011111111

+ As of 2009, the largest known prime that shows the distribution of prime numbers using "0" for primes and "1" for nonprime numbers. Found by Charles R. Greathouse IV.

Printed from the PrimePages <primes.utm.edu> © G. L. Honaker and Chris K. Caldwell