2 118 313 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
2852977038465693977	19	61.3	2011-01-25 09:56:23

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	166 / 640

Estimated T-Level: 26.3 ⓘ

TF below 2^82 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored		Mikael Billberg	B5E8083E0479B1C9	0	Windows,Prime95,v13,(aka WP1)
Factored	1999-02-07	Michael Boss	B5E8083E0479B1C9	463652	Windows,Prime95,v17,(aka WT1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-07	Oliver Kruse	563C9C17B6469791	1	0	1	3
Verified	PRP without proof (not generated)	2017-11-17	kkmrkkblmbrbk	563C9C17B6469791	1	18174	1	3

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor TF: 1-60
2017-11-17	kkmrkkblmbrbk	C-PRP	M2118313/2852977038465693977 : 563C9C17B6469791
2017-10-07	Oliver Kruse	C-PRP	M2118313/2852977038465693977 : 563C9C17B6469791
2016-03-27	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2011-01-25	James Heinrich	F	Factor: 2852977038465693977
2011-01-10	Joss	NF-PM1	B1=50000
2010-12-30	Joss	NF-PM1	B1=30000
2009-08-02	USAFSS	NF-PM1	B1=20000, B2=260000
2009-01-03	Sturle Sunde	NF	no factor TF: 60-61
2003-02-27	-anonymous-	NF-PM1	B1=2048, B2=204800, E=12
1999-02-07	-anonymous-	C-LL	B5E8083E0479B1C9
1999-01-17	-anonymous-	NF	no factor TF: 1-58