4 909 393 Exponent Status

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

PrimeNet Exponent Status

M_n

Details

Composite, with 1 known prime factor. Cofactor is composite.

Trial Factored to 2⁶⁸

TF target 2⁶⁵

Factored

Factor	Digits	Bits	Date
31960148431	11	34.9	old

ECM

Digits	B1	Curves
25	50000	15 / 280

Estimated T-Level: 20.3 ⓘ

TF below 2^62 is very unlikely to find new factors due to ECM effort.

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-09-20	kkmrkkblmbrbk	CA0C624E40E0B63B	1	0	1	3
Verified	PRP without proof (not generated)	2018-05-07	storm5510	CA0C624E40E0B63B	1	1992902	1	3

History

Date	User	Type	Result
2023-06-05	Stef42	NF-PM1	B1=6000000, B2=50331795150
2018-05-07	storm5510	C-PRP	M4909393/31960148431 : CA0C624E40E0B63B
2017-09-20	kkmrkkblmbrbk	C-PRP	M4909393/31960148431 : CA0C624E40E0B63B

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