389 531 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
779063	6	19.6	old
49785178049	11	35.5	2008-07-21 09:18:20
40042114721043137	17	55.2	2014-11-07 13:39:15
132329540300310887	18	56.9	2014-11-07 13:39:15

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	2017-09-23	Oliver Kruse	0857043127E395E4	4	0	1	3
Verified	2017-10-13	Oliver Kruse	0857043127E395E4	4	167938	1	3
Verified	2017-12-15	ATH	0857043127E395E4	4	54068	1	3
Unverified (Reliable)	2020-04-18	Oliver Kruse	EBDD0E8E87B908__	4	363337	5	3
Verified (Factored)	2022-05-12	Jorge Coveiro	EBDD0E8E87B90869	1	187700	5	3

History

Date	User	Type	Result
2024-02-19	Denial140	NF-PM1	B1=1000000, B2=6154694700
2022-05-12	Jorge Coveiro	C-PRP	M389531/779063 : EBDD0E8E87B90869 PRP proof power = 5 PRP: Verified (Factored) PRP proof never uploaded
2022-02-07	Lisander Viaene	NF-PM1	B1=50000
2020-04-18	Oliver Kruse	C-PRP	M389531/779063/49785178049/40042114721043137/132329540300310887 : EBDD0E8E87B90869 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-12-15	ATH	C-PRP	M389531/779063/49785178049/40042114721043137/132329540300310887 : 0857043127E395E4 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-10-13	Oliver Kruse	C-PRP	M389531/779063/49785178049/132329540300310887/40042114721043137 : 0857043127E395E4 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-23	Oliver Kruse	C-PRP	M389531/known_factors : 0857043127E395E4 PRP without proof (not generated)
2014-11-07	TJAOI	F-ECM	Factor: 40042114721043137
2014-11-07	TJAOI	F-ECM	Factor: 132329540300310887
2008-07-21	J Feitsma	F	Factor: 49785178049