12969...96801 (72-digits)

This number is a prime.

12
9694419029 0577505513 8577118456 4274499075 7009476567 5782153729 1527196801

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The largest prime factor of googol + 1 (which is 10^100 + 1). [Wallrodt]

Submitted: 2019-04-16 17:56:42; Last Modified: 2019-04-16 23:19:15.