1 922 951 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
3845903	7	21.9	old
45157765952777	14	45.4	2014-01-17 09:35:34
1697415203666407	16	50.6	2014-06-04 11:20:18
442021164357671909009	21	68.6	2021-04-30 15:25:47
2013201032906415009689	22	70.8	2015-10-05 01:04:17

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	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-30	alpertron	949B2D19385ECD0D	4	0	1	3
Verified (Factored)	2017-10-20	Oliver Kruse	949B2D19385ECD0D	4	1463290	1	3
Verified	2021-04-30	mikr	5C67199B64A0333B	5	646014	5	3
Verified	2021-04-30	riccardo uberti	5C67199B64A0333B	5	81942	5	3

P-1 factors

Date	Factor	B1	B2
2015-10-05	2013201032906415009689	500000	15000000

History

Date	User	Type	Result
2021-05-04	riccardo uberti	NF-PP1	Start=2/7, B1=3000000, B2=60000000
2021-05-04	riccardo uberti	NF-PM1	B1=6000000, B2=120000000, E=12
2021-04-30	Chad Steenerson	CERT	PRP Certification Proof certified good
2021-04-30	riccardo uberti	C-PRP	M1922951/3845903/45157765952777/1697415203666407/2013201032906415009689/442021164357671909009 : 5C67199B64A0333B PRP proof power = 7 PRP: Verified Proof certified good
2021-04-30	WR	CERT	PRP Certification Proof certified good
2021-04-30	mikr	C-PRP	M1922951/3845903/45157765952777/1697415203666407/442021164357671909009/2013201032906415009689 : 5C67199B64A0333B PRP proof power = 7 PRP: Verified Proof certified good
2021-04-30	nordi	F-ECM	Factor: 442021164357671909009 / (ECM curve 7, B1=50000, B2=6750000, Sigma=3533986670228518)
2017-10-20	Oliver Kruse	C-PRP	M1922951/3845903/45157765952777/1697415203666407/2013201032906415009689 : 949B2D19385ECD0D PRP: Verified (Factored) PRP without proof (not generated)
2017-09-30	alpertron	C-PRP	M1922951/3845903/45157765952777/1697415203666407/2013201032906415009689 : 949B2D19385ECD0D PRP: Verified (Factored) PRP without proof (not generated)
2015-10-05	alpertron	F-PM1	Factor: 2013201032906415009689 / (P-1, B1=500000, B2=15000000, E=12)
2014-06-04	TJAOI	F	Factor: 1697415203666407
2014-01-17	TJAOI	F	Factor: 45157765952777