19370...57287 (2506-digits)
This number is a probable-prime (likely to be a prime but we have not (re-)proven it on this site).
Just showing those entries submitted by 'Earls': (Click here to show all)
A Fermat and Lucas PRP consisting of the three numbers 193707721, 2^8233, and 761838257287, separated by three zeros. Note that the first and third numbers are the factors of 2^67-1, which were found by F. N. Cole in 1903. [Earls]
Printed from the PrimePages <t5k.org> © G. L. Honaker and Chris K. Caldwell