2 671 883 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 1 known prime factor. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
18620054979153643511	20	64.0	2010-12-08 18:42:13

ECM

Digits	B1	Curves
25	50000	61 / 280

Estimated T-Level: 21.1 ⓘ

TF below 2^65 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Al Lovrich	540A6443D2B3A0DB	0
Verified (Factored)	1999-04-13	Eric Vigeant	540A6443D2B3A0DB	1149033

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-18	Oliver Kruse	9A0C3C76EE2D90FB	1	713555	5	3
Verified	2017-12-03	kkmrkkblmbrbk	9A0C3C76EE2D90FB	1	1420448	5	3

History

Date	User	Type	Result
2022-03-11	LordJulius	NF	no factor from 2^1 to 2^60
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-03	kkmrkkblmbrbk	C-PRP	M2671883/18620054979153643511 : 9A0C3C76EE2D90FB PRP: Verified PRP without proof (not generated)
2017-10-18	Oliver Kruse	C-PRP	M2671883/18620054979153643511 : 9A0C3C76EE2D90FB PRP: Verified PRP without proof (not generated)
2010-12-08	markr	F-PM1	Factor: 18620054979153643511
2010-11-19	Joss	NF-PM1	B1=20000
2009-01-26	Sturle Sunde	NF	no factor from 2^60 to 2^61