195 761 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
2884256439161	13	41.4	old

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	426 / 1566

Estimated T-Level: 31.4 ⓘ

TF below 2^99 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-22	Oliver Kruse	744DB5DBA03514DD	1	0	1	3
Verified	2017-09-22	Oliver Kruse	744DB5DBA03514DD	1	0	1	3
Verified	2017-11-06	kkmrkkblmbrbk	744DB5DBA03514DD	1	128018	1	3
Verified	2020-04-17	Oliver Kruse	64FACF814FF50E1C	1	117348	5	3
Verified	2023-08-24	USAFSS	64FACF814FF50E1C	1	156146	5	3

History

Date	User	Type	Result
2023-08-24	twmoss	CERT	PRP Certification Proof certified good
2023-08-24	USAFSS	C-PRP	M195761/2884256439161 : 64FACF814FF50E1C PRP proof power = 5 PRP: Verified Proof certified good
2021-07-11	seatsea	F-ECM	Factor: 2884256439161 / (ECM curve 5, B1=250000, B2=38500000)
2020-04-17	Oliver Kruse	C-PRP	M195761/2884256439161 : 64FACF814FF50E1C PRP: Verified PRP without proof (small exponent)
2017-11-06	kkmrkkblmbrbk	C-PRP	M195761/2884256439161 : 744DB5DBA03514DD PRP: Verified PRP without proof (small exponent)
2017-09-22	Oliver Kruse	C-PRP	M195761/2884256439161 : 744DB5DBA03514DD PRP: Verified PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M195761/2884256439161 : 744DB5DBA03514DD PRP: Verified PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M195761/2884256439161 : 744DB5DBA03514DD PRP without proof (not generated)
2017-06-09	kkmrkkblmbrbk	NF-PM1	B1=100000000, B2=2000000000, E=12