95861...78973 (39-digits)

This number is a prime.

958619577 8359471439 3831931415 1899378973

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Omit the rightmost digit from the prime 958619577835947143938319314151899378973 and the remaining number is the largest right-truncatable semiprime. [Gupta and Honaker]

Submitted: 2008-01-13 20:07:17; Last Modified: 2023-10-11 16:15:13.