28 199 279 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

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Factored

Factor	Digits	Bits	Date
440256152130456210767	21	68.6	2017-02-15 16:43:16

Status	Date	User	Residue	Shift
Verified (Factored)	2005-04-02	Rick Beethe	8AD5DDC7B01CE011	15461465
Verified (Factored)	2011-09-30	ahmerali	8AD5DDC7B01CE011	26582666

History

Date	User	Type	Result
2022-07-05	masser	NF	no factor from 2^69 to 2^71
2017-02-15	Conductor	F	Factor: 440256152130456210767 / TF: 68-69
2011-09-30	ahmerali	C-LL	8AD5DDC7B01CE011

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