1 492 951 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
175517981848384804020407	24	77.2	2019-05-24 13:18:10
890586900140393448205283276416226537497	39	129.4	2015-04-21 11:35:32

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	107 / 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)		shelley giles	8CB984A905715CDC	0
Verified (Factored)	1998-11-14	Nuutti Kuosa	8CB984A905715CDC	285333

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-01	Oliver Kruse	3FA65053FC3F5D24	1	0	1	3
Verified (Factored)	2017-10-28	kkmrkkblmbrbk	3FA65053FC3F5D24	1	1050919	1	3
Verified	2019-05-24	ATH	CC43B5F83EFC8506	2	1196012	5	3
Verified	2019-05-25	kkmrkkblmbrbk	CC43B5F83EFC8506	2	801797	5	3

P-1 factors

Date	Factor	B1	B2
2015-04-21	890586900140393448205283276416226537497	2000000	60000000

History

Date	User	Type	Result
2022-03-09	LordJulius	NF	no factor from 2^1 to 2^60
2022-03-08	LordJulius	NF	no factor from 2^58 to 2^60
2019-05-25	kkmrkkblmbrbk	C-PRP	M1492951/890586900140393448205283276416226537497/175517981848384804020407 : CC43B5F83EFC8506 PRP: Verified PRP without proof (not generated)
2019-05-24	ATH	C-PRP	M1492951/890586900140393448205283276416226537497/175517981848384804020407 : CC43B5F83EFC8506 PRP: Verified PRP without proof (not generated)
2019-05-24	TJAOI	F-ECM	Factor: 175517981848384804020407 / (ECM curve 77, B1=50000, B2=5000000)
2017-10-28	kkmrkkblmbrbk	C-PRP	M1492951/890586900140393448205283276416226537497 : 3FA65053FC3F5D24 PRP: Verified PRP without proof (not generated)
2017-10-01	Oliver Kruse	C-PRP	M1492951/890586900140393448205283276416226537497 : 3FA65053FC3F5D24 PRP: Verified PRP without proof (not generated)
2015-04-21	alpertron	F-PM1	Factor: 890586900140393448205283276416226537497 / (P-1, B1=2000000, B2=60000000, E=12)
2015-04-07	snme2pm1	NF	no factor from 2^64 to 2^65
2015-04-07	snme2pm1	NF	no factor from 2^63 to 2^64
2011-12-07	markr	NF-PM1	B1=275000, B2=6000000, E=12
2011-05-28	GrunwalderGIMP	NF	no factor from 2^1 to 2^63
2010-05-06	Architects Cubed	NF	no factor from 2^60 to 2^61