2 697 913 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
4728263666144753277311	22	72.0	2015-01-27 11:16:27

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	68 / 640

Estimated T-Level: 25.5 ⓘ

TF below 2^80 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Norm Chamberlain	BF57DE393149CF79	0
Verified (Factored)	2000-04-19	Rick Adams	BF57DE393149CF79	108016

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-19	Oliver Kruse	3F708BAC8AACB3E9	1	463820	5	3
Verified	2017-12-04	kkmrkkblmbrbk	3F708BAC8AACB3E9	1	1712566	5	3

History

Date	User	Type	Result
2019-07-04	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-12-04	kkmrkkblmbrbk	C-PRP	M2697913/4728263666144753277311 : 3F708BAC8AACB3E9 PRP: Verified PRP without proof (not generated)
2017-10-19	Oliver Kruse	C-PRP	M2697913/4728263666144753277311 : 3F708BAC8AACB3E9 PRP: Verified PRP without proof (not generated)
2015-01-27	driveByUpgrades	F-ECM	Factor: 4728263666144753277311 / (ECM curve 3, B1=50000, B2=5000000)
2014-04-25	-Anonymous-	NF-PM1	B1=110000
2014-04-16	Joss	NF-PM1	B1=60000
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-04-28	markr	NF	no factor from 2^61 to 2^62
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61