197 507 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
195411372348557023	18	57.4	old
40816529536750543810018110777377	32	105.0	2022-06-09 04:42:54

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	168 / 1566

Estimated T-Level: 30.5 ⓘ

TF below 2^96 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-09-22	Oliver Kruse	8A53C87E04EBF148	1	0	1	3
Verified (Factored)	2017-10-12	kkmrkkblmbrbk	8A53C87E04EBF148	1	126122	1	3
Verified (Factored)	2020-04-17	Oliver Kruse	2C9EC79B16C9E3DF	1	60599	5	3
Verified	2022-06-09	SRJ2877	2C9EC79B16C9E3DF	2	85279	5	3
Verified	2022-06-09	LordJulius	2C9EC79B16C9E3DF	2	100348	5	3
Verified	2023-08-24	USAFSS	2C9EC79B16C9E3DF	2	181220	5	3

History

Date	User	Type	Result
2023-08-24	curtisc	CERT	PRP Certification Proof certified good
2023-08-24	USAFSS	C-PRP	M197507/195411372348557023/40816529536750543810018110777377 : 2C9EC79B16C9E3DF PRP proof power = 5 PRP: Verified Proof certified good
2022-06-09	John_Sauter	CERT	PRP Certification Proof certified good
2022-06-09	LordJulius	C-PRP	M197507/195411372348557023/40816529536750543810018110777377 : 2C9EC79B16C9E3DF PRP proof power = 5 PRP: Verified Proof certified good
2022-06-09	Ge yong	CERT	PRP Certification Proof certified good
2022-06-09	SRJ2877	C-PRP	M197507/195411372348557023/40816529536750543810018110777377 : 2C9EC79B16C9E3DF PRP proof power = 5 PRP: Verified Proof certified good
2022-06-09	Corey	F-ECM	Factor: 40816529536750543810018110777377 / (ECM curve 2, B1=250000, B2=25000000, Sigma=5355633196000105)
2020-04-17	Oliver Kruse	C-PRP	M197507/195411372348557023 : 2C9EC79B16C9E3DF PRP: Verified (Factored) PRP without proof (small exponent)
2017-10-12	kkmrkkblmbrbk	C-PRP	M197507/195411372348557023 : 8A53C87E04EBF148 PRP: Verified (Factored) PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M197507/195411372348557023 : 8A53C87E04EBF148 PRP: Verified (Factored) PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M197507/195411372348557023 : 8A53C87E04EBF148 PRP without proof (not generated)
2017-09-18	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=2000000000, E=12