1 161 691 Exponent Status

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

PrimeNet Exponent Status

M_n

Status

Details

Factored

Factor	Digits	Bits	Date
738885689621523297348793351	27	89.3	2018-06-01 11:32:54
114340359274197430614279044737	30	96.5	2018-01-15 16:22:07

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	100 / 640

Estimated T-Level: 25.8 ⓘ

TF below 2^81 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	3F4	0
Verified (Factored)		Len Ruth	1D930FD49B9043F4	0
Verified (Factored)	2002-07-27	Ethan O'Connor	1D930FD49B9043F4	736732
Verified (Factored)	2016-06-01	MadPoo	1D930FD49B9043F4	984835

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2018-01-16	ANONYMOUS	8BCC67D22BC75A34	1	225392	5	3
Verified (Factored)	2018-01-21	Oliver Kruse	8BCC67D22BC75A34	1	420421	5	3
Verified	2018-06-01	axn	8BCC67D22BC75A34	2	579536	5	3

P-1 factors

Date	Factor	B1	B2
2018-01-15	114340359274197430614279044737	15000000	500000000

History

Date	User	Type	Result
2018-06-01	axn	C-PRP	M1161691/114340359274197430614279044737/738885689621523297348793351 : 8BCC67D22BC75A34 PRP: Verified PRP without proof (not generated)
2018-06-01	TJAOI	F-ECM	Factor: 738885689621523297348793351 / (ECM curve 35, B1=50000, B2=5000000)
2018-01-21	Oliver Kruse	C-PRP	M1161691/114340359274197430614279044737 : 8BCC67D22BC75A34 PRP: Verified PRP without proof (not generated)
2018-01-16	ANONYMOUS	C-PRP	M1161691/114340359274197430614279044737 : 8BCC67D22BC75A34 PRP: Verified PRP without proof (not generated)
2018-01-15	mikr	F-PM1	Factor: 114340359274197430614279044737 / (P-1, B1=15000000, B2=500000000, E=12)
2016-06-01	MadPoo	C-LL	1D930FD49B9043F4
2016-04-07	Joss	NF-PM1	B1=3173906, B2=57130308, E=12
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-09-17	omylist	NF	no factor from 2^65 to 2^66
2015-01-09	lycorn	NF	no factor from 2^64 to 2^65
2014-12-31	Matthias Wurtinger	NF	no factor from 2^63 to 2^64
2012-10-11	dbaugh	NF	no factor from 2^62 to 2^63
2012-02-05	markr	NF-PM1	B1=500000, B2=10000000, E=12
2011-05-09	Xyzzy	NF	no factor from 2^61 to 2^62
2009-02-15	Sturle Sunde	NF	no factor from 2^60 to 2^61