is 2 4230917 - 1
has 1273633 decimal digits
takes 0.528 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L48F35C04D5A28582double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual2677.023065.6716%20000200000.00360.3544%7.026765.7933%0.1216%
PrimeNet2610.072662.2951%180003600000.00662.9177%0.079263.3952%1.1001%
GPU722651.724464.6154%240004500000.00851.9218%1.732965.2954%0.6800%
Difference+2+5.2987+1.0563%-4000-430000-0.0049-1.5675%+5.2937+0.4979%+0.4979%

Known prime factors (2 factors, 128.0 bits, 0.00302574% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
4230917118914421672638158172063.3671405303172724
22 × 3 × 11 × 79 × 2917 × 46199
2010-06-122917461990.80150.00100.0011
4230917289466548576506251272064.6503420848820439
3420848820439
2017-12-06134208488204391.395433,70662,953

1 Composite Factors:
exponentprime factorscomposite factordigitsbits*
423091734421747217549861158980564857744023375939128.017
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2000-07-03T00:00:00ANONYMOUSv4_computers2000020000---0.004--0.354%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2001-09-30T00:00:00ANONYMOUSv4_computers21261--0.073--
2022-06-21T17:31:18LordJuliusManual testing261263--0.305--
2022-06-21T17:31:18LordJuliusManual testing26326463.367200.4241.0720.862
2017-12-05T12:36:45TJAOIManual testing264265*64.650200.5541.0721.126


ECM factoring results:

Old Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CurvesCompleteFacMiss

New Calculation Method

Total ECM effort:0.000 GHz-days
DigitsB1CompleteFacMiss


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
2000-08-01T00:00:00ANONYMOUSv4_computers48F35C04D5A285820.528


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-20T06:34:41kkmrkkblmbrbkManual testing
11891442167263815817
611286A8F75EC1__no
2017-12-05T14:28:01ATHec2-1xd
11891442167263815817
28946654857650625127
8E9E76596C0D61__no
2017-12-28T19:44:47kkmrkkblmbrbkc4.xlarge
11891442167263815817
28946654857650625127
8E9E76596C0D61__no


P-1 factor-bounds graph:
B1 = 20000 (P-1 stage 1)
100
101
102
103
104
105
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
265
264
263
261
250
260
270
280
290
2100
Last modified: 2022-06-21T17:31:18+00:00