2 611 663 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
121552442862297987329	21	66.7	old

ECM

Digits	B1	Curves
25	50000	90 / 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		Matthew Watkins	D3718FEC09BCDCD9	0	Windows,Prime95,v13,(aka WP1)
Factored	1999-04-23	Gary Neilsen	D3718FEC09BCDCD9	136209	Windows,Prime95,v17,(aka WT1)

Status	Proof	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	PRP without proof (not generated)	2017-10-15	Oliver Kruse	1AD2E147225D7A40	1	294972	5	3
Verified	PRP without proof (not generated)	2017-12-02	storm5510	1AD2E147225D7A40	1	2366187	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	M2611663/121552442862297987329 : 1AD2E147225D7A40
2017-10-15	Oliver Kruse	C-PRP	M2611663/121552442862297987329 : 1AD2E147225D7A40
2003-11-08	Team Prime Rib	F-PM1	Factor: 121552442862297987329
2003-10-31	-anonymous-	F-PM1	Factor: 121552442862297987329
1999-04-23	-anonymous-	C-LL	D3718FEC09BCDCD9
1999-03-26	-anonymous-	NF	no factor TF: 1-59