is 2 5821499 - 1
has 1752446 decimal digits
takes 1.032 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L7B71D0D491DDB3BBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.104265.6716%6500010887500.03102.4662%5.135266.5183%0.8466%
PrimeNet2620.105562.9032%240005500000.01353.1912%0.119164.0871%1.1838%
GPU722662.536965.1515%360008000000.01992.2796%2.556865.9459%0.7944%
Difference+1+2.5673+0.5201%+29000+288750+0.0111+0.1866%+2.5784+0.5723%+0.5723%

Known prime factors (1 factor, 80.3 bits, 0.00137949% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
582149914953921516421818562565612580.307128437035859851720
23 × 3 × 5 × 16903 × 63320631377
2016-03-26169036332063137746,979886.531,655.8

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-09-23T00:00:00MadPoov4_computers25000243750---0.009--1.301%
2011-04-22T20:17:00harleeP4_2600650001088750---0.031--2.466%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-04-27T00:00:00ANONYMOUSv4_computers21262--0.106--
1998-08-02T00:00:00ANONYMOUSv4_computers21262--0.106--
2016-02-23T16:39:12Mark RoseManual testing262263--0.169--
2014-10-09T13:02:00NesowaManual testing263264--0.337--
2014-10-18T16:46:00lycornManual testing264265--0.642--
2015-09-13T23:46:00snme2pm1Manual testing265266--1.284--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.078 GHz-days
Estimated T-Level:0.200
DigitsB1CurvesCompleteFacMiss
20110004 / 1000.04096.060%
25500004 / 2800.01498.579%

New Calculation Method

Total ECM effort:1.078 GHz-days
Estimated T-Level:0.200
DigitsB1CompleteFacMiss
20110000.12987.895%
25500000.01298.841%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.808
50000500000010.269


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-29T00:00:00ANONYMOUSv4_computers7B71D0D491DDB3BB1.032
2000-10-15T00:00:00MadPoov4_computers7B71D0D491DDB3BB1.032


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:26:34kkmrkkblmbrbkManual testing
1495392151642181856256561
3547E4688858E0__no
2018-08-22T22:46:46Luigi MorelliCS50X-C9
1495392151642181856256561
3547E4688858E0__no


P-1 factor-bounds graph:
B1 = 65000, B2 = 1088750 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 25000, B2 = 243750 (P-1 stage 2)
B1 = 25000 (P-1 stage 1)
103
104
105
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2018-08-22T22:46:46+00:00