2 617 553 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 2⁶³

Factored

Factor	Digits	Bits	Date
3622641460876181213365193	25	81.6	2016-04-26 10:45:16

P-1 factors

Date	Factors	B1	B2
2016-04-26	3622641460876181213365193	200000	6857915

ECM

Digits	B1	Curves
25	50000	101 / 280

Estimated T-Level: 21.8 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored		Gary Dunne	FE78781E861756BD	0	Windows,Prime95,v13,(aka WP1)
Factored	1999-05-02	Mikko Tommila	FE78781E861756BD	1220519	Windows,Prime95,v17,(aka WT1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-17	Oliver Kruse	AB704F6A4F467D25	1	2139613	5	3
Verified	PRP without proof (not generated)	2017-12-02	storm5510	AB704F6A4F467D25	1	925664	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-02	storm5510	C-PRP	M2617553/3622641460876181213365193 : AB704F6A4F467D25
2017-10-17	Oliver Kruse	C-PRP	M2617553/3622641460876181213365193 : AB704F6A4F467D25
2016-04-26	Joss	F-PM1	Factor: 3622641460876181213365193 / B1=200000, B2=6857915
2016-02-23	Mark Rose	NF	no factor TF: 59-60
2016-02-08	ramgeis	NF	no factor TF: 65-66
2015-02-18	VictordeHollander	NF	no factor TF: 64-65
2015-02-18	VictordeHollander	NF	no factor TF: 63-64
2014-10-12	Joss	NF-PM1	B1=124521
2013-01-23	dbaugh	NF	no factor TF: 62-63
2012-06-19	markr	NF	no factor TF: 61-62
2010-12-12	markr	NF-PM1	B1=100000, B2=2125000, E=6
2010-11-17	Joss	NF-PM1	B1=20000
2009-02-01	Sturle Sunde	NF	no factor TF: 60-61
2003-11-08	Team Prime Rib	NF-PM1	B1=15000, B2=217500
2003-10-31	-anonymous-	NF-PM1	B1=2048, B2=204800
1999-05-02	-anonymous-	C-LL	FE78781E861756BD
1999-04-02	-anonymous-	NF	no factor TF: 1-59