2 308 079 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 2⁶²

Factored

Factor	Digits	Bits	Date
4058122300758072409	19	61.8	2012-05-13 15:34:33

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	121 / 640

Estimated T-Level: 25.9 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored		Thomas Honold	A659FC29F216C030	0	Linux 32-bit,Prime95,v13,(aka WP2)
Factored	1999-05-09	Ethan Hansen	A659FC29F216C030	17392	Windows,Prime95,v18,NT service,(aka WU5)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-11	Oliver Kruse	FFDE01CCD23B5A37	1	0	1	3
Verified	PRP without proof (not generated)	2017-11-22	storm5510	FFDE01CCD23B5A37	1	1374319	1	3

History

Date	User	Type	Result
2021-04-09	ViliamF	NF-PM1	B1=5000000, B2=405000000
2018-02-21	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2017-11-22	storm5510	C-PRP	M2308079/4058122300758072409 : FFDE01CCD23B5A37
2017-10-11	Oliver Kruse	C-PRP	M2308079/4058122300758072409 : FFDE01CCD23B5A37
2012-05-13	Sebastian Hornbostel	F-ECM	Factor: 4058122300758072409
2010-02-16	Bud	NF-PM1	B1=500000, B2=10000000, E=12
2009-01-14	Sturle Sunde	NF	no factor TF: 60-61
2003-09-14	-anonymous-	NF-PM1	B1=2048, B2=204800
1999-05-09	Dry Creek Photo	C-LL	A659FC29F216C030