491 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 6 known prime factors. Cofactor is PRP (Probable-Prime).

Trial Factored to 2⁶⁸

TF target 2⁴⁴

Factored

Factor	Digits	Bits	Date
983	3	9.9	old
7707719	7	22.9	old
110097436327057	15	46.6	old
6976447052525718623	19	62.6	old
19970905118623195851890562673	29	94.0	old
3717542676439779473786876643915388439	37	121.5	old

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Factored	No proof (small exponent)	2024-09-06	George Woltman	PRP_PRP_PRP_PRP_	6	0	1	3

History

Date	User	Type	Result
2024-09-06	George Woltman	P-PRP	M491/983/7707719/110097436327057/6976447052525718623/19970905118623195851890562673/3717542676439779473786876643915388439 PRP Cofactor

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