2 946 439 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
156506938861459739719	21	67.1	2010-11-04 17:04:15
2107182005622671678925313	25	80.8	2010-11-04 17:04:15

ECM

Digits	B1	Curves
25	50000	58 / 280

Estimated T-Level: 21.0 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		David Tegerdine	058C831FE889966C	0
Verified (Factored)	1999-05-16	Jakob Trier	058C831FE889966C	682680

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-25	Oliver Kruse	A180AE1C90F1361E	2	344828	5	3
Verified	2017-12-09	kkmrkkblmbrbk	A180AE1C90F1361E	2	449671	5	3

History

Date	User	Type	Result
2023-02-27	USAFSS	NF-PM1	B1=280000, B2=219875040
2017-12-09	kkmrkkblmbrbk	C-PRP	M2946439/156506938861459739719/2107182005622671678925313 : A180AE1C90F1361E PRP: Verified PRP without proof (not generated)
2017-10-25	Oliver Kruse	C-PRP	M2946439/156506938861459739719/2107182005622671678925313 : A180AE1C90F1361E PRP: Verified PRP without proof (not generated)
2010-11-04	markr	F-PM1	Factor: 329788605323955589952187007373986874620607047
2009-02-14	Sturle Sunde	NF	no factor from 2^60 to 2^61