is 2 2492443 - 1
has 750301 decimal digits
takes 0.173 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L841F1E440A7ADF47double-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26711.921667.1642%2382500857701000.69658.1996%12.618169.8566%2.6924%
PrimeNet2590.030862.7119%100001800000.00192.5364%0.032763.6577%0.9458%
GPU722630.640365.0794%110001600000.00191.3812%0.642365.5617%0.4823%
Difference+4+11.2813+2.0848%+2371500+85610100+0.6946+6.8184%+11.9759+4.2949%+4.2949%

Known prime factors (1 factor, 65.7 bits, 0.00263693% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
2492443609346182514783930732065.72412223873976552
23 × 72 × 31183351981
2015-07-1449311833519813.1815170.87319.14

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-10-23T00:00:00ANONYMOUSv4_computers2048204800---0.001--0.291%
2003-10-31T00:00:00Team Prime Ribv4_computers15000228750---0.003--0.920%
2010-12-22T11:37:00Jocelyn LaroucheManual testing2000020000---0.002--0.314%
2011-01-22T07:46:00Oscar Östlin950001971250---0.020--2.689%
2014-09-10T00:51:00Jocelyn LaroucheManual testing120752120752---0.012--1.054%
2014-11-30T23:50:00mikrMSI238250085770100---0.697--8.200%
2019-07-04T12:38:13alpertronManual testing20000006000000012---0.519--7.645%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
1999-05-02T00:00:00ANONYMOUSv4_computers21259--0.031--
2022-03-10T05:53:02LordJuliusManual testing21260--0.062--
2009-01-11T00:07:00Sturle Sundegoose.ifi260261--0.062--
2012-06-11T09:42:00Sebastian HornbostelManual testing261262--0.123--
2013-01-23T08:29:00dbaughManual testing262263--0.394--
2015-03-03T21:37:00VictordeHollanderManual testing263264--0.788--
2015-03-03T21:37:00VictordeHollanderManual testing264265--1.499--


ECM factoring results:

Old Calculation Method

Total ECM effort:1.103 GHz-days
Estimated T-Level:0.600
DigitsB1CurvesCompleteFacMiss
201100012 / 1000.12088.638%
255000012 / 2800.04395.797%

New Calculation Method

Total ECM effort:1.103 GHz-days
Estimated T-Level:0.600
DigitsB1CompleteFacMiss
20110000.38767.903%
25500000.03596.562%
302500000.00299.785%


ECM Summary

B1B2factorcurvesGHz-days
500005000000111.011
50000500000010.092


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-10-07T00:00:00ANONYMOUSv4_computers841F1E440A7ADF470.173


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-15T02:45:22kkmrkkblmbrbkc4.xlarge
60934618251478393073
F5174E460025E5__no
2017-11-07T01:42:13Oliver KruseGTX-1
60934618251478393073
F5174E460025E5__no


P-1 factor-bounds graph:
B1 = 2382500, B2 = 85770100 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2382500 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 95000, B2 = 1971250 (P-1 stage 2)
B1 = 120752 (P-1 stage 1)
B1 = 95000 (P-1 stage 1)
B1 = 15000, B2 = 228750 (P-1 stage 2)
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)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
1011
TF factor-bounds graph:
267
265
264
263
262
261
260
259
250
260
270
280
290
2100
Last modified: 2022-03-10T05:53:02+00:00