12345...00001 (7845-digits)

This number is a prime.

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A prime of form k*10^n+1, (k=123456789987654321, n=8780). It is the largest prime with this property for n up to ten-thousand. [Bajpai]

Submitted: 2013-03-08 15:14:14; Last Modified: 2026-11-08 15:40:59.