is 2 6148627 - 1
has 1850922 decimal digits
takes 1.090 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-LD094B6338988FC08double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2674.832665.6716%11500022425000.05933.2738%4.891966.7955%1.1239%
PrimeNet2620.099962.9032%260006000000.01473.3430%0.114664.1434%1.2401%
GPU722662.401965.1515%400009000000.02232.4269%2.424265.9973%0.8458%
Difference+1+2.4307+0.5201%+75000+1342500+0.0370+0.8469%+2.4677+0.7982%+0.7982%

Known prime factors (1 factor, 75.8 bits, 0.00123276% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
6148627656858791944085035123532375.7985341507884151088
24 × 13 × 809 × 31743295879
2016-05-25809317432958791,295.1444.42830.06

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-11-25T00:00:00ANONYMOUSv4_computers30000285000---0.011--1.446%
2013-03-02T19:36:00Squeeky_SquirrelT7500_22001150002242500---0.059--3.274%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-09-13T00:00:00ANONYMOUSv4_computers21261--0.050--
1998-09-27T00:00:00ANONYMOUSv4_computers21262--0.100--
2016-02-23T16:39:19Mark RoseManual testing262263--0.160--
2014-09-10T22:05:00NesowaManual testing263264--0.319--
2014-09-18T11:03:00monstManual testing264265--0.608--
2015-10-08T02:09:53Bruno VictalManual testing265266--1.215--
2016-04-08T22:48:57Gordon SpenceManual testing266267--2.431--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.617 GHz-days
Estimated T-Level:0.300
DigitsB1CurvesCompleteFacMiss
20110006 / 1000.06094.148%
25500006 / 2800.02197.876%

New Calculation Method

Total ECM effort:1.617 GHz-days
Estimated T-Level:0.300
DigitsB1CompleteFacMiss
20110000.19482.403%
25500000.01798.266%
302500000.00199.892%


ECM Summary

B1B2factorcurvesGHz-days
50000500000030.808
50000500000030.808


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00ANONYMOUSv4_computersD094B6338988FC081.090
2000-12-31T00:00:00ANONYMOUSv4_computersD094B6338988FC081.090


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T19:45:49kkmrkkblmbrbkManual testing
65685879194408503512353
7F876C5CF3AA0B__no
2018-09-18T15:15:51ANONYMOUS
65685879194408503512353
7F876C5CF3AA0B__no


P-1 factor-bounds graph:
B1 = 115000, B2 = 2242500 (P-1 stage 2)
B1 = 115000 (P-1 stage 1)
B1 = 30000, B2 = 285000 (P-1 stage 2)
B1 = 30000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
266
265
264
263
262
261
250
260
270
280
290
2100
Last modified: 2018-09-18T15:15:51+00:00