1 990 031 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
827852897	9	29.6	old
5816372142697182161	19	62.3	2016-07-27 10:37:11
48255948414955230024109961	26	85.3	2022-06-27 07:00:04

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	65 / 640

Estimated T-Level: 25.5 ⓘ

TF below 2^80 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-05	Oliver Kruse	A1BF519322AABC52	2	0	1	3
Verified (Factored)	2017-11-12	kkmrkkblmbrbk	A1BF519322AABC52	2	1280195	1	3
Verified	2022-07-04	Ryan Propper	CDB04015E4C8CA59	3	929247	5	3
Verified	2022-07-21	some-students	CDB04015E4C8CA59	3	1846738	5	3

History

Date	User	Type	Result
2022-08-14	USAFSS	NF-PM1	B1=132000, B2=134381520
2022-07-25	lozcs	CERT	PRP Certification Proof certified good
2022-07-21	some-students	C-PRP	M1990031/827852897/5816372142697182161/48255948414955230024109961 : CDB04015E4C8CA59 PRP proof power = 7 PRP: Verified Proof certified good
2022-07-04	Simon Josefsson	CERT	PRP Certification Proof certified good
2022-07-04	Ryan Propper	C-PRP	M1990031/827852897/5816372142697182161/48255948414955230024109961 : CDB04015E4C8CA59 PRP proof power = 7 PRP: Verified Proof certified good
2022-06-27	debrouxl	F-ECM	Factor: 48255948414955230024109961 / (ECM curve 46, B1=50000, B2=7050000, Sigma=7951345104547398)
2017-11-12	kkmrkkblmbrbk	C-PRP	M1990031/827852897/5816372142697182161 : A1BF519322AABC52 PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1990031/827852897/5816372142697182161 : A1BF519322AABC52 PRP: Verified (Factored) PRP without proof (not generated)
2016-07-27	TJAOI	F	Factor: 5816372142697182161 / TF: 62-63