is 2 5938781 - 1
has 1787752 decimal digits
takes 1.052 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L98FDB22938CAE337double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.003465.6716%36000089100000.21225.0971%5.215667.4214%1.7498%
PrimeNet2620.103462.9032%260006000000.01473.3241%0.118264.1364%1.2331%
GPU722662.486865.1515%400008000000.02092.3438%2.507765.9683%0.8168%
Difference+1+2.5166+0.5201%+320000+8110000+0.1913+2.7533%+2.7079+1.4531%+1.4531%

Known prime factors (1 factor, 90.4 bits, 0.00152281% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
593878116753784517862402678779643272890.437141054069158825714223
3 × 1193 × 51197 × 769802660321
2016-05-095119776980266032161,440,33510,77820,130

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-10-15T00:00:00ANONYMOUSv4_computers2000065000---0.006--0.758%
2011-03-17T19:53:00harleeP4_2600700001120000---0.033--2.528%
2014-11-16T08:09:00Nesowanewfs3600008910000---0.212--5.097%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-08-24T00:00:00ANONYMOUSv4_computers21261--0.052--
1998-09-20T00:00:00ANONYMOUSv4_computers21262--0.103--
1998-09-27T00:00:00ANONYMOUSv4_computers21262--0.103--
1998-11-21T00:00:00ANONYMOUSv4_computers21262--0.103--
2016-02-23T16:39:14Mark RoseManual testing262263--0.165--
2014-09-29T09:32:00NesowaManual testing263264--0.331--
2014-10-01T02:05:00monstManual testing264265--0.629--
2015-09-20T21:47:00snme2pm1Manual testing265266--1.258--


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)
1998-11-28T00:00:00ANONYMOUSv4_computers98FDB22938CAE3371.052
2000-12-07T00:00:00ANONYMOUSv4_computers98FDB22938CAE3371.052
2015-05-02T00:00:00MadPooManual testing98FDB22938CAE3371.052


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T17:59:46kkmrkkblmbrbkManual testing
1675378451786240267877964327
245330CBCEFDDE__no
2018-09-13T03:32:25ANONYMOUS
1675378451786240267877964327
245330CBCEFDDE__no


P-1 factor-bounds graph:
B1 = 360000, B2 = 8910000 (P-1 stage 2)
B1 = 360000 (P-1 stage 1)
B1 = 70000, B2 = 1120000 (P-1 stage 2)
B1 = 70000 (P-1 stage 1)
B1 = 20000, B2 = 65000 (P-1 stage 2)
B1 = 20000 (P-1 stage 1)
103
104
105
106
103
104
105
106
107
108
109
1010
1011
1012
TF factor-bounds graph:
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2018-09-13T03:32:25+00:00