37171...11177 (41-digits)

This number is a prime.

3 7171177117 7177711171 1111117717 7171111177

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Largest known prime number formed by concatenating the last digit from each of the first n Mersenne primes in order. [Fee]

Submitted: 2026-01-26 23:14:15; Last Modified: 2026-01-26 23:26:07.