538 771 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
9697879	7	23.2	old
49023221547473	14	45.5	2014-01-22 11:26:24
5884331357586306235679	22	72.3	2015-06-19 10:51:00

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	2017-09-28	Oliver Kruse	045633B0E44F7A6F	3	0	1	3
Verified	2017-10-13	Oliver Kruse	045633B0E44F7A6F	3	254548	1	3
Verified	2017-12-17	ATH	045633B0E44F7A6F	3	35883	1	3
Unverified (Reliable)	2020-04-19	Oliver Kruse	C1083BE828E130__	3	502545	5	3

History

Date	User	Type	Result
2021-08-07	ViliamF	NF-PM1	B1=20000000, B2=2460000000
2020-04-19	Oliver Kruse	C-PRP	M538771/9697879/49023221547473/5884331357586306235679 : C1083BE828E130__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-12-17	ATH	C-PRP	M538771/9697879/49023221547473/5884331357586306235679 : 045633B0E44F7A6F PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-13	Oliver Kruse	C-PRP	M538771/9697879/49023221547473/5884331357586306235679 : 045633B0E44F7A6F PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-28	Oliver Kruse	C-PRP	M538771/9697879/49023221547473/5884331357586306235679 : 045633B0E44F7A6F PRP: Unverified (Reliable) PRP without proof (not generated)
2017-09-27	Oliver Kruse	C-PRP	M538771/9697879/49023221547473/5884331357586306235679 : 045633B0E44F7A6F PRP without proof (not generated)
2016-03-16	alpertron	NF-PM1	B1=1500000, B2=50000000, E=12
2015-06-19	TJAOI	F-ECM	Factor: 5884331357586306235679 / (ECM curve 42, B1=50000, B2=5000000)
2014-01-22	TJAOI	F	Factor: 49023221547473