is 2 2372371 - 1
has 714155 decimal digits
takes 0.160 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L43EDE8E5168363C0double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.525067.1642%2000000600000000.50557.6062%13.030469.6617%2.4976%
PrimeNet2590.032462.7119%100001700000.00182.4742%0.034263.6345%0.9226%
GPU722630.672865.0794%100001400000.00171.2718%0.674465.5235%0.4441%
Difference+4+11.8522+2.0848%+1990000+59860000+0.5038+6.3344%+12.3560+4.1383%+4.1383%

Known prime factors (1 factor, 62.0 bits, 0.00261547% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
237237147694962858216088891962.0491005217203764
22 × 173 × 1452626017
2010-02-0817314526260170.39737.752514.480

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-21T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.287%
2018-09-28T16:24:06alpertronManual testing20000006000000012---0.505--7.606%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-01T00:00:00ANONYMOUSv4_computers21259--0.032--
2022-03-09T16:37:53LordJuliusManual testing21260--0.065--
2009-01-16T04:58:00Sturle Sundejodel.ifi260261--0.065--


ECM factoring results:

Old Calculation Method

Total ECM effort:0.267 GHz-days
Estimated T-Level:0.150
DigitsB1CurvesCompleteFacMiss
20110003 / 1000.03097.030%
25500003 / 2800.01198.932%

New Calculation Method

Total ECM effort:0.267 GHz-days
Estimated T-Level:0.150
DigitsB1CompleteFacMiss
20110000.11589.102%
25500000.01198.938%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
50000500000030.267


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-01T00:00:00ANONYMOUSv4_computers43EDE8E5168363C00.160


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-12T12:57:58Oliver KruseGTX-0640492C6F7F5AA__no
2017-11-25T06:20:42kkmrkkblmbrbkc4.xlarge
4769496285821608889
640492C6F7F5AA__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
101
102
103
104
105
106
107
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-09T16:37:53+00:00