2 445 923 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
7615192395331207221559	22	72.7	2017-11-28 16:56:18

ECM

Digits	B1	Curves
25	50000	28 / 280

Estimated T-Level: 20.5 ⓘ

TF below 2^63 is very unlikely to find new factors due to ECM effort.

Status	Date	User	Residue	Shift
Verified (Factored)		Zyg Furmaniuk	15604DFD1AA82BD7	0
Verified (Factored)	1999-03-15	Phillip L. Poplin	15604DFD1AA82BD7	1442848

Status	Date	User	Residue	Number of known factors	Shift	Type	Base
Verified	2017-11-29	kkmrkkblmbrbk	F7B7D01D9292F553	1	1381531	5	3
Verified	2017-11-29	ATH	F7B7D01D9292F553	1	1514977	5	3

History

Date	User	Type	Result
2018-09-28	alpertron	NF-PM1	B1=2000000, B2=60000000, E=12
2017-11-29	ATH	C-PRP	M2445923/7615192395331207221559 : F7B7D01D9292F553 PRP: Verified PRP without proof (not generated)
2017-11-29	kkmrkkblmbrbk	C-PRP	M2445923/7615192395331207221559 : F7B7D01D9292F553 PRP: Verified PRP without proof (not generated)
2017-11-28	bam	F-ECM	Factor: 7615192395331207221559 / (ECM curve 1, B1=50000, B2=5000000)
2017-07-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^1 to 2^60
2015-10-25	ramgeis	NF	no factor from 2^65 to 2^66
2015-02-27	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-02-27	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-01-24	mikr	NF-PM1	B1=1172000, B2=48000000, E=12
2013-12-04	Jerry Hallett	NF	no factor from 2^62 to 2^63
2011-10-04	Sebastian Hornbostel	NF	no factor from 2^61 to 2^62
2011-01-18	Oscar Östlin	NF-PM1	B1=95000, B2=1947500, E=6
2010-11-19	Joss	NF-PM1	B1=20000
2009-01-14	Sturle Sunde	NF	no factor from 2^60 to 2^61