is 2 6275327 - 1
has 1889062 decimal digits
takes 1.112 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LCE26E4E3B96D3C0Ddouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.735065.6716%16000034800000.08763.8090%4.822666.9792%1.3076%
PrimeNet2620.097962.9032%260006000000.01473.3541%0.112664.1475%1.2443%
GPU722662.353465.1515%400009000000.02232.4351%2.375766.0001%0.8486%
Difference+1+2.3816+0.5201%+120000+2580000+0.0653+1.3739%+2.4469+0.9791%+0.9791%

Known prime factors (1 factor, 74.4 bits, 0.00118516% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6275327244593209257530044574012374.3731948848317048100
22 × 3 × 52 × 13 × 1993 × 250729903
2016-08-0119932507299031,037.23.51086.5564

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2001-03-05T00:00:00ANONYMOUSv4_computers2500025000---0.006--0.460%
2011-05-30T23:37:00markrtiny1600003480000---0.088--3.809%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-07-11T00:00:00ANONYMOUSv4_computers21261--0.049--
1998-09-06T00:00:00ANONYMOUSv4_computers21262--0.098--
2016-02-23T16:39:21Mark RoseManual testing262263--0.156--
2014-09-12T09:14:00NesowaManual testing263264--0.313--
2014-09-14T19:48:00monstManual testing264265--0.595--
2015-10-16T01:14:28snme2pm1Manual testing265266--1.191--
2016-03-25T09:24:59Gordon SpenceManual testing266267--2.382--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.347 GHz-days
Estimated T-Level:0.250
DigitsB1CurvesCompleteFacMiss
20110005 / 1000.05095.099%
25500005 / 2800.01898.227%

New Calculation Method

Total ECM effort:1.347 GHz-days
Estimated T-Level:0.250
DigitsB1CompleteFacMiss
20110000.16185.104%
25500000.01598.553%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.808
50000500000020.539


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-01T00:00:00Phantomasv4_computersCE26E4E3B96D3C0D1.112
2001-04-21T00:00:00ANONYMOUSv4_computersCE26E4E3B96D3C0D1.112


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-22T22:18:58kkmrkkblmbrbkc4.xlarge
24459320925753004457401
03FA5C3F242636__no
2018-09-26T05:24:58ANONYMOUS
24459320925753004457401
03FA5C3F242636__no


P-1 factor-bounds graph:
B1 = 160000, B2 = 3480000 (P-1 stage 2)
B1 = 160000 (P-1 stage 1)
B1 = 25000 (P-1 stage 1)
102
103
104
105
106
102
103
104
105
106
107
108
109
TF factor-bounds graph:
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2018-09-26T05:24:58+00:00