1 377 781 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
35778370278638365799	20	65.0	2009-08-11 18:18:05
284887525620322844624407	24	77.9	2018-11-30 11:52:36

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	105 / 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)		Mark Skidmore	A8014365CFBCF663	0
Verified (Factored)		Cornelius Caesar	A8014365CFBCF663	0
Verified (Factored)	2008-03-05	Brian J. Beesley	A8014365CFBCF663	939014

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-30	Oliver Kruse	C3AFA18D9D5B1B5C	1	0	1	3
Verified (Factored)	2017-11-04	kkmrkkblmbrbk	C3AFA18D9D5B1B5C	1	710009	1	3
Verified	2018-11-30	rucio	709BD544A3EF6DF0	2	269019	5	3
Verified	2018-12-06	Ducho_YYZ	709BD544A3EF6DF0	2	235315	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^58 to 2^60
2018-12-06	Ducho_YYZ	C-PRP	M1377781/35778370278638365799/284887525620322844624407 : 709BD544A3EF6DF0 PRP: Verified PRP without proof (not generated)
2018-11-30	rucio	C-PRP	M1377781/35778370278638365799/284887525620322844624407 : 709BD544A3EF6DF0 PRP: Verified PRP without proof (not generated)
2018-11-30	TJAOI	F-ECM	Factor: 284887525620322844624407 / (ECM curve 106, B1=50000, B2=5000000)
2017-11-04	kkmrkkblmbrbk	C-PRP	M1377781/35778370278638365799 : C3AFA18D9D5B1B5C PRP: Verified PRP without proof (not generated)
2017-09-30	Oliver Kruse	C-PRP	M1377781/35778370278638365799 : C3AFA18D9D5B1B5C PRP: Verified PRP without proof (not generated)
2016-03-17	alpertron	NF-PM1	B1=500000, B2=15000000, E=12
2009-08-11	Lupo	F-ECM	Factor: 35778370278638365799
2009-02-17	Sturle Sunde	NF	no factor from 2^60 to 2^61