1 980 469 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
550946671111	12	39.0	old
172468906391202586769	21	67.2	2021-02-11 19:04:50

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	59 / 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	B19F1C7BD862808A	1	0	1	3
Verified (Factored)	2017-11-12	kkmrkkblmbrbk	B19F1C7BD862808A	1	362209	1	3
Verified	2021-02-13	LaurV	B39041B6F6A96E80	2	14422	5	3

History

Date	User	Type	Result
2023-09-02	Kevin_9611	NF-PM1	B1=1000000, B2=1685121900
2022-08-13	USAFSS	NF-PM1	B1=88000, B2=95986800
2021-02-13	Michael Pawellek	CERT	PRP Certification Proof certified good
2021-02-13	LaurV	C-PRP	M1980469/550946671111/172468906391202586769 : B39041B6F6A96E80 PRP proof power = 7 PRP: Verified Proof certified good
2021-02-11	_p95holder_	F-ECM	Factor: 172468906391202586769 / (ECM curve 6, B1=50000, B2=5000000)
2017-11-12	kkmrkkblmbrbk	C-PRP	M1980469/550946671111 : B19F1C7BD862808A PRP: Verified (Factored) PRP without proof (not generated)
2017-10-05	Oliver Kruse	C-PRP	M1980469/550946671111 : B19F1C7BD862808A PRP: Verified (Factored) PRP without proof (not generated)