is 2 2415239 - 1
has 727060 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-LA75878EB41740029double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26712.302767.1642%2000000600000000.50557.6202%12.808169.6663%2.5022%
PrimeNet2590.031862.7119%100001800000.00192.5215%0.033763.6521%0.9402%
GPU722630.660865.0794%100001400000.00171.2765%0.662565.5251%0.4458%
Difference+4+11.6419+2.0848%+1990000+59860000+0.5038+6.3437%+12.1456+4.1412%+4.1412%

Known prime factors (1 factor, 96.0 bits, 0.00397420% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2415239784929094794068912380677808632995.98716249511845288787411529
32 × 69493 × 449759 × 57766610563
2014-03-24449759577666105634.450e+9308.34575.81

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-08T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.288%
2010-11-09T10:51:00Jocelyn LaroucheManual testing1500015000---0.001--0.244%
2010-11-16T23:09:00Jocelyn LaroucheManual testing2000020000---0.002--0.311%
2010-12-19T21:08:00markrtiny950001923750---0.019--2.661%
2014-03-24T13:06:00mikrMSI2000000600000002995.9870.5050.3261.0117.620%
2018-09-28T16:26:06alpertronManual testing20000006000000012---0.505--7.620%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1998-03-31T00:00:00ANONYMOUSv4_computers21258--0.016--
1999-03-15T00:00:00Datav4_computers21259--0.032--
2022-03-09T16:37:59LordJuliusManual testing21260--0.064--
2009-01-15T17:12:00Sturle Sundeghia.ifi260261--0.064--
2012-06-04T07:43:00Sebastian HornbostelManual testing261262--0.127--
2013-12-04T21:14:00Jerry HallettManual testing262263--0.406--


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)
1998-03-31T00:00:00ANONYMOUSv4_computersA75878EB417400290.163
1999-03-26T00:00:00Datav4_computersA75878EB417400290.163


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-13T04:56:49Oliver KruseGTX-15A9D3AA1AA8873__no
2017-11-26T21:29:35kkmrkkblmbrbkc4.xlarge
78492909479406891238067780863
5A9D3AA1AA8873__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
109
1010
1011
TF factor-bounds graph:
267
263
262
261
260
259
258
250
260
270
280
290
2100
Last modified: 2022-03-09T16:37:59+00:00