38 711 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
73473479	8	26.1	old
643464439972262725270294466033	30	99.0	2015-09-30 11:01:00
470658679174995133089712378188353023	36	118.5	2016-12-02 01:00:00

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	640 / 640
35	1000000	1566 / 1566
40	3000000	676 / 4588

Estimated T-Level: 35.7 ⓘ

TF below 2^114 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-09-21	Oliver Kruse	6716C544028CA372	3	0	1	3
Verified	2017-10-02	kkmrkkblmbrbk	6716C544028CA372	3	0	1	3
Verified	2017-12-07	ATH	6716C544028CA372	3	3157	1	3
Unverified	2020-04-17	Oliver Kruse	61BB46AA90FC7D__	3	37695	5	3

P-1 factors

Date	Factor	B1	B2
2016-12-02	470658679174995133089712378188353023	200000000	3042115842738

History

Date	User	Type	Result
2022-05-31	nordi	NF-PM1	B1=2000000000, B2=401927737170960
2022-04-28	nordi	NF-PM1	B1=2000000000
2021-05-05	ATH	NF-PP1	Start=2/7, B1=100000000, B2=10000000000
2020-04-17	Oliver Kruse	C-PRP	M38711/73473479/643464439972262725270294466033/470658679174995133089712378188353023 : 61BB46AA90FC7D__ PRP without proof (small exponent)
2017-12-07	ATH	C-PRP	M38711/73473479/643464439972262725270294466033/470658679174995133089712378188353023 : 6716C544028CA372 PRP without proof (small exponent)
2017-10-02	kkmrkkblmbrbk	C-PRP	M38711/73473479/643464439972262725270294466033/470658679174995133089712378188353023 : 6716C544028CA372 PRP without proof (not generated)
2017-09-21	Oliver Kruse	C-PRP	M38711/73473479/643464439972262725270294466033/470658679174995133089712378188353023 : 6716C544028CA372 PRP without proof (not generated)
2016-12-02	kkmrkkblmbrbk	F-PM1	Factor: 470658679174995133089712378188353023 / (P-1, B1=200000000, B2=3042115842738)
2016-11-05	kkmrkkblmbrbk	NF-PM1	B1=200000000, B2=5000000000, E=12
2015-09-30	James Hintz	F-ECM	Factor: 643464439972262725270294466033 / (ECM curve 115, B1=250000, B2=25000000)