1 838 909 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
2271636011445046544033986001	28	90.9	2015-07-05 22:22:48

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	110 / 640

Estimated T-Level: 25.9 ⓘ

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

Status	Date	User	Residue	Shift
Verified (Factored)		Ruud Harmsen	F36B119E71D88319	0
Verified (Factored)	1998-12-21	Jim Simpson	F36B119E71D88319	1149976

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-10-04	Oliver Kruse	7F57FD1470330FBA	1	0	1	3
Verified	2017-11-06	kkmrkkblmbrbk	7F57FD1470330FBA	1	1799996	1	3

P-1 factors

Date	Factor	B1	B2
2015-07-05	2271636011445046544033986001	2780000	0

History

Date	User	Type	Result
2023-04-17	Kevin_9611	NF-PM1	B1=3340000, B2=6420933750
2017-11-06	kkmrkkblmbrbk	C-PRP	M1838909/2271636011445046544033986001 : 7F57FD1470330FBA PRP: Verified PRP without proof (not generated)
2017-10-04	Oliver Kruse	C-PRP	M1838909/2271636011445046544033986001 : 7F57FD1470330FBA PRP: Verified PRP without proof (not generated)
2015-07-05	mikr	F-PM1	Factor: 2271636011445046544033986001 / (P-1, B1=2780000)
2015-04-27	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-27	snme2pm1	NF	no factor from 2^63 to 2^64
2014-09-23	Joss	NF-PM1	B1=169806
2014-05-19	Joss	NF-PM1	B1=134903
2011-02-02	Carsten Kossendey	NF-PM1	B1=100000, B2=1675000, E=6
2011-01-21	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-04-20	Architects Cubed	NF	no factor from 2^60 to 2^61