487 397 Exponent Status

Great Internet Mersenne Prime Search
GIMPS
Finding World Record Primes Since 1996

PrimeNet Exponent Status

M_n

Status

Details

Composite, with 2 known prime factors. Cofactor is composite.

Factored

Factor	Digits	Bits	Date
3899177	7	21.9	old
977026494675209169738697	24	79.7	2015-05-22 10:23:21

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	200 / 640

Estimated T-Level: 26.6 ⓘ

TF below 2^83 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-26	Oliver Kruse	E464A85BE7763C65	2	0	1	3
Verified	2017-09-27	Oliver Kruse	E464A85BE7763C65	2	0	1	3
Verified	2017-11-09	kkmrkkblmbrbk	E464A85BE7763C65	2	346447	1	3
Verified	2020-04-18	Oliver Kruse	D0BCD84B42732DC4	2	141852	5	3
Verified	2024-11-27	kkmrkkblmbrbk	D0BCD84B42732DC4	2	91646	5	3

History

Date	User	Type	Result
2024-11-27	Wentao Huang	CERT	PRP Certification Proof certified good
2024-11-27	kkmrkkblmbrbk	C-PRP	M487397/3899177/977026494675209169738697 : D0BCD84B42732DC4 PRP proof power = 6 PRP: Verified Proof certified good
2024-08-22	cramsey87	NF-PM1	B1=7000000, B2=42834594660
2020-04-18	Oliver Kruse	C-PRP	M487397/3899177/977026494675209169738697 : D0BCD84B42732DC4 PRP: Verified PRP without proof (small exponent)
2017-11-09	kkmrkkblmbrbk	C-PRP	M487397/3899177/977026494675209169738697 : E464A85BE7763C65 PRP: Verified PRP without proof (small exponent)
2017-09-27	Oliver Kruse	C-PRP	M487397/3899177/977026494675209169738697 : E464A85BE7763C65 PRP: Verified PRP without proof (not generated)
2017-09-26	Oliver Kruse	C-PRP	M487397/3899177/977026494675209169738697 : E464A85BE7763C65 PRP: Verified PRP without proof (not generated)
2015-05-22	TJAOI	F-ECM	Factor: 977026494675209169738697 / (ECM curve 46, B1=50000, B2=5000000)