2 203 637 Exponent Status

PrimeNet Exponent Status

M_n

Status

Details

2203637

Composite: proven not-prime with Lucas-Lehmer test

No factors below 2⁷⁰

TF target 2⁶²

TF below 2^82 is very unlikely to find new factors due to ECM effort.

P-1

B1 =	10000000
B2 =	42721122990

ECM

Digits	B1	Curves
25	50000	280 / 280
30	250000	136 / 640

Estimated T-Level: 26.1 ⓘ

Status	Date	User	Residue	Shift
Verified		Paul Kwiatkowski	06EA8A7DAC5EB23D	0
Verified	1999-02-07	David Phillips	06EA8A7DAC5EB23D	1792895
Verified	2018-04-16	kkmrkkblmbrbk	06EA8A7DAC5EB23D	552244

History

Date	User	Type	Result
2023-08-10	Sid & Andy	NF-PM1	B1=10000000, B2=42721122990
2023-07-09	Joss	NF-PM1	B1=1000000, B2=3860037720
2023-03-19	Joss	NF-PM1	B1=1000000, B2=1809697890
2023-02-10	Joss	NF-PM1	B1=1000000, B2=627837210
2022-10-25	Architects Cubed	NF	no factor from 2^69 to 2^70
2021-07-15	TJAOI	NF	no factor from 2^68 to 2^69
2019-12-06	mikr	NF-PM1	B1=5000000, B2=200000000, E=12
2019-05-13	TJAOI	NF	no factor from 2^67 to 2^68
2018-04-16	kkmrkkblmbrbk	C-LL	06EA8A7DAC5EB23D
2016-12-12	Gordon Spence	NF	no factor from 2^66 to 2^67
2016-02-23	Mark Rose	NF	no factor from 2^58 to 2^60
2015-12-22	Alexander Dubrovin	NF-PM1	B1=2000000, B2=200000000, E=12
2015-12-19	Alexander Dubrovin	NF-PM1	B1=2000000, B2=120000000, E=12
2015-12-12	Alexander Dubrovin	NF-PM1	B1=2000000, B2=91000000, E=12
2015-11-21	Alexander Dubrovin	NF-PM1	B1=1000000, B2=90000000, E=12
2015-11-21	Alexander Dubrovin	NF-PM1	B1=1000000, B2=70000000, E=6
2015-11-21	Alexander Dubrovin	NF-PM1	B1=1000000, B2=65000000, E=6
2015-11-21	Alexander Dubrovin	NF-PM1	B1=1000000, B2=60000000, E=12
2015-11-21	Alexander Dubrovin	NF-PM1	B1=1000000, B2=50000000, E=6
2015-11-19	Alexander Dubrovin	NF-PM1	B1=1000000, B2=45000000, E=12
2015-11-19	Alexander Dubrovin	NF-PM1	B1=1000000, B2=35000000, E=6
2015-11-19	Alexander Dubrovin	NF-PM1	B1=1000000, B2=30000000, E=12
2015-11-19	Alexander Dubrovin	NF-PM1	B1=1000000, B2=20000000, E=6
2015-11-17	Alexander Dubrovin	NF-PM1	B1=1000000, B2=14000000, E=6
2015-11-17	Alexander Dubrovin	NF-PM1	B1=1000000, B2=10000000, E=12
2015-11-14	Alexander Dubrovin	NF-PM1	B1=1000000, B2=3000000, E=6
2015-11-13	Alexander Dubrovin	NF-PM1	B1=500000, B2=1700000, E=6
2015-10-21	ramgeis	NF	no factor from 2^65 to 2^66
2015-03-03	VictordeHollander	NF	no factor from 2^64 to 2^65
2015-03-03	VictordeHollander	NF	no factor from 2^63 to 2^64
2014-10-17	Joss	NF-PM1	B1=148254
2014-06-24	Joss	NF-PM1	B1=119127
2013-12-04	LaurV	NF	no factor from 2^62 to 2^63
2011-01-10	markr	NF-PM1	B1=90000, B2=1642500, E=6
2010-11-09	Joss	NF-PM1	B1=30000
2010-11-05	Joss	NF-PM1	B1=15000
2009-01-08	Sturle Sunde	NF	no factor from 2^61 to 2^62
2009-01-02	Sturle Sunde	NF	no factor from 2^60 to 2^61

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