is 2 2407697 - 1
has 724790 decimal digits
takes 0.163 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L582ECBBBB8959F3Fdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.341267.1642%2000000600000000.50557.6178%12.846769.6655%2.5014%
PrimeNet2590.031962.7119%100001800000.00192.5200%0.033863.6515%0.9397%
GPU722630.662965.0794%100001400000.00171.2757%0.664665.5248%0.4455%
Difference+4+11.6783+2.0848%+1990000+59860000+0.5038+6.3421%+12.1821+4.1407%+4.1407%

Known prime factors (1 factor, 87.1 bits, 0.00361824% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
24076971677378818083843517864202972787.11634833677536746598884
22 × 3 × 11 × 127 × 229 × 337 × 110581 × 243487
2014-03-0311058124348724,919,8080.01150.0220

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-08T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.288%
2010-11-09T10:50:00Jocelyn LaroucheManual testing1500015000---0.001--0.244%
2010-11-16T23:08:00Jocelyn LaroucheManual testing2000020000---0.002--0.311%
2010-12-21T18:37:00markrtiny950001923750---0.019--2.659%
2014-03-03T20:37:00mikrMSI2000000600000002787.1160.1960.3250.3927.618%
2018-09-28T16:26:24alpertronManual testing20000006000000012-
skipped known factor: 167737881808384351786420297
--0.505--7.618%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-03-15T00:00:00foxkidv4_computers21259--0.032--
2022-03-09T16:37:58LordJuliusManual testing21260--0.064--
2009-01-15T23:43:00Sturle Sundegicy.ifi260261--0.064--
2012-06-03T16:43:00Sebastian HornbostelManual testing261262--0.128--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.408--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.069 GHz-days
Estimated T-Level:0.600
DigitsB1CurvesCompleteFacMiss
201100012 / 1000.12088.638%
255000012 / 2800.04395.797%

New Calculation Method

Total ECM effort:1.069 GHz-days
Estimated T-Level:0.600
DigitsB1CompleteFacMiss
20110000.38767.903%
25500000.03596.562%
302500000.00299.785%


ECM Summary

B1B2factorcurvesGHz-days
500005000000121.069


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-03-15T00:00:00foxkidv4_computers582ECBBBB8959F3F0.163


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-13T01:21:26Oliver KruseGTX-1D28B1349B0D3BA__no
2017-11-26T14:07:54kkmrkkblmbrbkc4.xlarge
167737881808384351786420297
D28B1349B0D3BA__no


P-1 factor-bounds graph:
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2000000 (P-1 stage 1)
B1 = 95000, B2 = 1923750 (P-1 stage 2)
B1 = 95000 (P-1 stage 1)
B1 = 20000 (P-1 stage 1)
B1 = 15000 (P-1 stage 1)
B1 = 2048, B2 = 204800 (P-1 stage 2)
B1 = 2048 (P-1 stage 1)
102
103
104
105
106
107
102
103
104
105
106
107
108
TF factor-bounds graph:
267
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-09T16:37:58+00:00