2 580 953 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
762158550804462333961	21	69.4	2016-07-20 08:18:49

P-1 factors

Date	Factors	B1	B2
2016-07-20	762158550804462333961	3200000	112000000

ECM

Digits	B1	Curves
25	50000	87 / 280

Estimated T-Level: 21.6 ⓘ

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

Status	Date	User	Residue	Shift	Software
Factored		Tom Waskow	A60B7A2908A14EB4	0	Windows,Prime95,v13,(aka WP1)
Factored	1999-04-02	James Arnold	A60B7A2908A14EB4	531517	Windows,Prime95,v17,NT service,(aka WT5)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-15	Oliver Kruse	E7212F38C7ED36FB	1	1730797	5	3
Verified	PRP without proof (not generated)	2017-12-02	storm5510	E7212F38C7ED36FB	1	1032813	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	M2580953/762158550804462333961 : E7212F38C7ED36FB
2017-10-15	Oliver Kruse	C-PRP	M2580953/762158550804462333961 : E7212F38C7ED36FB
2016-07-20	mikr	F-PM1	Factor: 762158550804462333961 / B1=3200000, B2=112000000
2016-02-23	Mark Rose	NF	no factor TF: 59-60
2015-11-08	ramgeis	NF	no factor TF: 65-66
2015-02-27	VictordeHollander	NF	no factor TF: 64-65
2015-02-27	VictordeHollander	NF	no factor TF: 63-64
2013-01-23	dbaugh	NF	no factor TF: 62-63
2012-06-20	Sebastian Hornbostel	NF	no factor TF: 61-62
2011-10-10	markr	NF-PM1	B1=175000, B2=4112500, E=6
2011-01-12	Joss	NF-PM1	B1=50000
2010-11-14	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor TF: 60-61
2003-11-08	Team Prime Rib	NF-PM1	B1=15000, B2=206250
2003-10-31	-anonymous-	NF-PM1	B1=2048, B2=204800
1999-04-02	-anonymous-	C-LL	A60B7A2908A14EB4
1999-03-26	-anonymous-	NF	no factor TF: 1-59