2 778 827 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
843669683124377413324970801	27	89.4	2017-03-25 12:53:32

ECM

Digits	B1	Curves
25	50000	21 / 280

Estimated T-Level: 20.4 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Skip Zogopoulos	696E28648651CB73	0
Verified (Factored)		Bill Hirst	696E28648651CB73	0
Verified (Factored)	1999-07-30	Martijn Otto	696E28648651CB73	1809239

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-21	Oliver Kruse	6556E68FFA85A939	1	1850810	5	3
Verified	2017-12-06	kkmrkkblmbrbk	6556E68FFA85A939	1	389558	5	3

P-1 factors

Date	Factor	B1	B2
2017-03-25	843669683124377413324970801	2700000	84000000

History

Date	User	Type	Result
2017-12-06	kkmrkkblmbrbk	C-PRP	M2778827/843669683124377413324970801 : 6556E68FFA85A939 PRP: Verified PRP without proof (not generated)
2017-10-21	Oliver Kruse	C-PRP	M2778827/843669683124377413324970801 : 6556E68FFA85A939 PRP: Verified PRP without proof (not generated)
2017-03-25	mikr	F-PM1	Factor: 843669683124377413324970801 / (P-1, B1=2700000, B2=84000000, E=12)
2017-03-11	Joss	NF-PM1	B1=315187, B2=3151870, E=6
2017-01-10	Joss	NF-PM1	B1=262656
2017-01-10	Joss	NF-PM1	B1=218880
2016-12-18	Joss	NF-PM1	B1=182400
2016-08-06	Joss	NF-PM1	B1=152000, B2=4785000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-12-12	omylist	NF	no factor from 2^65 to 2^66
2015-04-21	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-04-21	VictordeHollander	NF	no factor from 2^63 to 2^64
2013-01-10	dbaugh	NF	no factor from 2^62 to 2^63
2012-03-29	Grant McCracken	NF	no factor from 2^61 to 2^62
2010-11-27	markr	NF-PM1	B1=110000, B2=2392500, E=6
2010-11-10	Joss	NF-PM1	B1=15000
2009-01-28	Sturle Sunde	NF	no factor from 2^60 to 2^61