338 993 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
9129399365811603356947559	25	82.9	2015-12-01 09:09:38

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	237 / 640

Estimated T-Level: 26.9 ⓘ

TF below 2^84 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		David Slowinski	3D88	0
Verified (Factored)		Unknown	7D88	0
Verified (Factored)		Guillermo Ballester Valor	DE7EFB0E490EFD88	0
Verified (Factored)		Eivind Triel	DE7EFB0E490EFD88	66180
Verified (Factored)	2002-01-15	Dennis Pope	DE7EFB0E490EFD88	147441

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-24	Oliver Kruse	CE985E43FEF25783	1	0	1	3
Verified	2017-09-30	alpertron	CE985E43FEF25783	1	0	1	3
Verified	2017-12-07	ATH	CE985E43FEF25783	1	189060	1	3
Unverified (Reliable)	2020-04-18	Oliver Kruse	09F401C9DF7632__	1	70270	5	3

History

Date	User	Type	Result
2022-03-07	LordJulius	NF	no factor from 2^54 to 2^55
2021-06-24	George Woltman	NF-PP1	Start=2/7, B1=10000000, B2=830000000
2020-04-18	Oliver Kruse	C-PRP	M338993/9129399365811603356947559 : 09F401C9DF7632__ PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M338993/9129399365811603356947559 : CE985E43FEF25783 PRP: Unverified (Reliable) PRP without proof (small exponent)
2017-09-30	alpertron	C-PRP	M338993/9129399365811603356947559 : CE985E43FEF25783 PRP: Unverified (Reliable) PRP without proof (not generated)
2017-09-24	Oliver Kruse	C-PRP	M338993/9129399365811603356947559 : CE985E43FEF25783 PRP: Unverified (Reliable) PRP without proof (not generated)
2017-09-22	Oliver Kruse	C-PRP	M338993/9129399365811603356947559 : CE985E43FEF25783 PRP without proof (not generated)
2015-12-01	bam	F-ECM	Factor: 9129399365811603356947559 / (ECM curve 1, B1=250000, B2=25000000)
2015-07-25	NR	NF	no factor from 2^61 to 2^62
2013-05-18	Sid & Andy	NF	no factor from 2^60 to 2^61
2012-02-03	alpertron	NF-PM1	B1=10000000, B2=200000000, E=12
2011-08-09	Joss	NF-PM1	B1=1350780
2009-01-27	Sturle Sunde	NF	no factor from 2^59 to 2^60
2008-12-30	Sturle Sunde	NF	no factor from 2^58 to 2^59