2 490 029 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
2563254627473440639	19	61.2	2009-02-25 09:06:34

ECM

Digits	B1	Curves
25	50000	133 / 280

Estimated T-Level: 22.4 ⓘ

TF below 2^69 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift	Software
Factored		Kevin Panko	5C0BEB2C0AFB4408	0	Windows,Prime95,v14,(aka WQ1)
Factored	1999-05-16	Matthew Beck	5C0BEB2C0AFB4408	441593	Windows,Prime95,v17,(aka WT1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-14	Oliver Kruse	78D1CDD718D1240B	1	62540	5	3
Verified	PRP without proof (not generated)	2017-11-30	storm5510	78D1CDD718D1240B	1	1527738	5	3

History

Date	User	Type	Result
2022-03-10	LordJulius	NF	no factor TF: 1-60
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-30	storm5510	C-PRP	M2490029/2563254627473440639 : 78D1CDD718D1240B
2017-10-14	Oliver Kruse	C-PRP	M2490029/2563254627473440639 : 78D1CDD718D1240B
2009-02-25	Lukasz Wrobel	F-ECM	Factor: 2563254627473440639
2009-01-15	Sturle Sunde	NF	no factor TF: 60-61
2003-10-31	Team Prime Rib	NF-PM1	B1=15000, B2=228750
2003-10-23	-anonymous-	NF-PM1	B1=2048, B2=204800
1999-05-16	-anonymous-	C-LL	5C0BEB2C0AFB4408
1999-05-02	-anonymous-	NF	no factor TF: 1-59