10223...64511 (1800-digits)

This number is a prime.

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10223454 * 10^1792 + 72064511 and its twin 10223454 * 10^1792 + 72064513 are both emirps: the largest known twin emirps (as of 3 November 2026). All four primes were proven by ECPP. [Garg]

Submitted: 2026-11-03 02:16:35; Last Modified: 2026-11-03 02:23:17.