18732...77981 (1191-digits)

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

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The smallest titanic prime of the form 2^1+2^2+2^3+...+2^n-1, case n=3953. [Sariyar]

Submitted: 2020-08-09 00:45:55; Last Modified: 2020-08-09 00:47:41.