13285...68421 (1000-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 known titanic hailstone prime (formed using starting number 1328544). See PC421. [Sariyar]

Submitted: 2022-01-28 22:40:47; Last Modified: 2022-01-28 23:07:44.