is 2 5647601 - 1
has 1700098 decimal digits
takes 0.892 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L13874FFB1CD84DDCdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2675.261365.6716%6500010400000.02702.4264%5.288466.5046%0.8330%
PrimeNet2620.108862.9032%240005500000.01213.1752%0.120864.0811%1.1779%
GPU722662.615065.1515%360007000000.01652.1931%2.631565.9158%0.7642%
Difference+1+2.6463+0.5201%+29000+340000+0.0105+0.2334%+2.6569+0.5888%+0.5888%

Known prime factors (1 factor, 79.6 bits, 0.00141019% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
56476019432542864387847061899132479.64283509288850149356
22 × 3 × 4523 × 1538604334331
2015-09-054523153860433433131,98319,19535,850

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-08-17T00:00:00ANONYMOUSv4_computers2000020000---0.005--0.379%
2001-05-27T00:00:00ANONYMOUSv4_computers2000020000---0.005--0.379%
2011-01-30T16:32:00harleeP4_2600650001040000---0.027--2.426%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-09-13T00:00:00ANONYMOUSv4_computers21262--0.109--
2009-04-13T04:27:00GrunwalderGIMPManual testing262263--0.174--
2014-11-18T20:13:00NesowaManual testing263264--0.348--
2014-11-19T14:25:00monstManual testing264265--0.662--
2015-08-26T11:06:00snme2pm1Manual testing265266--1.323--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.201 GHz-days
Estimated T-Level:0.250
DigitsB1CurvesCompleteFacMiss
20110005 / 1000.05095.099%
25500005 / 2800.01898.227%

New Calculation Method

Total ECM effort:1.201 GHz-days
Estimated T-Level:0.250
DigitsB1CompleteFacMiss
20110000.19282.505%
25500000.01898.236%
302500000.00199.888%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.720
50000500000020.480


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-21T00:00:00ANONYMOUSv4_computers13874FFB1CD84DDC0.892
2001-08-18T00:00:00ANONYMOUSv4_computers13874FFB1CD84DDC0.892


PRP results:
dateuseridcompidcofactorsres64PRP
2017-12-10T20:21:03Oliver KruseThreadripper
943254286438784706189913
CB2C44A4C5E136__no
2018-04-10T10:50:28kkmrkkblmbrbkc5.large
943254286438784706189913
CB2C44A4C5E136__no


P-1 factor-bounds graph:
B1 = 65000, B2 = 1040000 (P-1 stage 2)
B1 = 65000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
102
103
104
105
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
266
265
264
263
262
250
260
270
280
290
2100
Last modified: 2018-04-10T10:50:28+00:00