2 121 241 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
12727447	8	23.6	old
202911149810524302964048223	27	87.4	2022-04-14 21:36:43

ECM

Digits	B1	Curves
25	50000	102 / 280

Estimated T-Level: 21.8 ⓘ

TF below 2^67 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified (Factored)	2017-10-07	Oliver Kruse	FEEBE375200DA412	1	0	1	3
Verified (Factored)	2017-11-17	kkmrkkblmbrbk	FEEBE375200DA412	1	563001	1	3
Verified	2022-04-16	_p95holder_	F8EB85DB26AF4CE7	2	780127	5	3
Verified	2022-04-20	XZT	F8EB85DB26AF4CE7	2	566268	5	3

History

Date	User	Type	Result
2022-04-20	Jon Pace	CERT	PRP Certification Proof certified good
2022-04-20	XZT	C-PRP	M2121241/12727447/202911149810524302964048223 : F8EB85DB26AF4CE7 PRP proof power = 7 PRP: Verified Proof certified good
2022-04-16	_p95holder_	C-PRP	M2121241/12727447/202911149810524302964048223 : F8EB85DB26AF4CE7 PRP: Verified PRP without proof (not generated)
2022-04-14	_p95holder_	F-ECM	Factor: 202911149810524302964048223 / (ECM curve 4, B1=50000, B2=5000000)
2017-11-17	kkmrkkblmbrbk	C-PRP	M2121241/12727447 : FEEBE375200DA412 PRP: Verified PRP without proof (not generated)
2017-10-07	Oliver Kruse	C-PRP	M2121241/12727447 : FEEBE375200DA412 PRP: Verified PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=500000, B2=15000000, E=12