23196...63621 (60-digits)

This number is a prime.

2319694877 1907255347 6532687103 8912211708 3071628375 7301763621

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The largest prime factor of ((2^106)*(2^107-1)) + 1, i.e., one more than the eleventh perfect number (the last one found before modern computers).

Submitted: 2004-04-26 03:11:32; Last Modified: 2008-01-30 17:28:00.