2 618 747 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
43197307765291219089601	23	75.2	2021-04-21 09:52:26

ECM

Digits	B1	Curves
25	50000	105 / 280

Estimated T-Level: 21.9 ⓘ

TF below 2^68 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		nmainer	BC6A2E3DD1BB58EB	0
Verified (Factored)	1999-04-13	Jim Simpson	BC6A2E3DD1BB58EB	278708
Verified (Factored)	2018-07-07	kkmrkkblmbrbk	BC6A2E3DD1BB58EB	1640560

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2021-04-22	Chad Steenerson	02D0D8DC47E4BB03	1	705711	5	3

History

Date	User	Type	Result
2021-04-22	curtisc	CERT	PRP Certification Proof certified good
2021-04-22	Chad Steenerson	C-PRP	M2618747/43197307765291219089601 : 02D0D8DC47E4BB03 PRP proof power = 7 PRP: Verified Proof certified good
2021-04-21	Sergey Nosov	F-ECM	Factor: 43197307765291219089601 / (ECM curve 4, B1=50000, B2=5000000)
2019-10-14	masser	NF-PM1	B1=2618747, B2=26187470, E=12
2019-04-15	TJAOI	NF	no factor from 2^67 to 2^68
2018-07-07	kkmrkkblmbrbk	C-LL	BC6A2E3DD1BB58EB
2017-08-30	Gordon Spence	NF	no factor from 2^66 to 2^67
2017-07-20	Joss	NF-PM1	B1=400000, B2=4000000, E=6
2016-05-23	Joss	NF-PM1	B1=200000, B2=3600000, E=6
2016-02-23	Mark Rose	NF	no factor from 2^59 to 2^60
2016-01-17	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-18	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-18	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-13	Joss	NF-PM1	B1=124510
2013-01-14	dbaugh	NF	no factor from 2^62 to 2^63
2012-06-18	markr	NF	no factor from 2^61 to 2^62
2010-12-12	markr	NF-PM1	B1=100000, B2=2125000, E=6
2010-11-17	Joss	NF-PM1	B1=20000
2009-01-30	Sturle Sunde	NF	no factor from 2^60 to 2^61