is 2 1452923 - 1
has 437374 decimal digits
takes 0.055 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L19E15A5B147149FBdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.451168.6567%2500000625000000.31947.4084%20.770570.9787%2.3220%
PrimeNet2560.006662.5000%70001200000.00072.9053%0.007363.5895%1.0895%
GPU722600.105765.0000%6500900000.00061.3971%0.106365.4890%0.4890%
Difference+7+20.3454+3.6567%+2493500+62410000+0.3188+6.0113%+20.6642+5.4898%+5.4898%

Known prime factors (1 factor, 75.5 bits, 0.00519493% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1452923526291769466541304932012375.47818111481801394200
23 × 52 × 23 × 3937278652477
2016-09-0925393727865247710,16811,87622,181

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2003-09-29T00:00:00Team Prime Ribv4_computers15000243750---0.002--0.839%
2010-08-07T00:34:00Rob_Deetwopc100000200000---0.006--1.217%
2010-08-07T18:27:00Rob_Deetwopc200000300000---0.011--1.520%
2010-08-08T17:00:00Rob_Deetwopc2000001000000---0.013--2.333%
2010-08-09T16:21:00Rob_Deetwopc2000002000000---0.017--2.820%
2010-08-10T17:25:00Rob_Deetwopc2000003000000---0.020--3.112%
2010-08-11T16:27:00Rob_Deetwopc2000004000000---0.023--3.321%
2010-08-12T16:33:00Rob_Deetwopc2000005000000---0.026--3.486%
2014-11-17T02:17:00Jocelyn LaroucheManual testing244176244176---0.014--1.386%
2015-01-28T11:16:00Jocelyn LaroucheManual testing324997324997---0.018--1.589%
2015-01-30T21:42:00Jocelyn LaroucheManual testing357496357496---0.020--1.661%
2015-02-09T22:19:00alpertronManual testing50000015000000---0.071--4.929%
2015-05-26T11:23:00alpertronManual testing200000060000000---0.286--7.230%
2016-08-21T22:03:03Bruno Victal5820K-factoring25000006250000012---0.319--7.408%
2016-08-27T10:53:55Bruno VictalManual testing25000006250000012---0.319--7.408%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2003-07-21T00:00:00ANONYMOUSv4_computers21258--0.026--
2016-02-23T16:28:32Mark RoseManual testing258260--0.079--
2010-05-08T18:30:00Architects Cubeda3_bu2260261--0.106--
2016-02-23T16:28:32Mark RoseManual testing261262--0.211--
2011-03-08T05:14:00GrunwalderGIMPManual testing21263--1.098--
2016-02-23T16:28:32Mark RoseManual testing262263--0.676--
2015-03-26T22:59:00snme2pm1Manual testing263264--1.351--
2015-03-26T22:59:00snme2pm1Manual testing264265--2.572--
2015-09-17T08:50:00ramgeisManual testing265266--5.143--


ECM factoring results:

Old Calculation Method

Total ECM effort:26.448 GHz-days
Estimated T-Level:25.391
DigitsB1CurvesCompleteFacMiss
2011000301 / 1003.0104.855%
2550000301 / 2801.07534.064%
3025000050 / 6400.07892.479%

New Calculation Method

Total ECM effort:26.448 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.39024.916%
302500000.11689.004%
3510000000.00899.198%


ECM Summary

B1B2factorcurvesGHz-days
50000500000025011.84
50000500000010.047
250000400000005014.56


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1998-12-27T00:00:00ANONYMOUSv4_computers19E15A5B147149FB0.055
2015-07-19T16:38:00MadPooManual testing19E15A5B147149FB0.055


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T01:59:46Oliver KruseGTX-1
52629176946654130493201
A7AD06E55C6AA2__no
2017-10-27T14:31:32kkmrkkblmbrbkc4.xlarge
52629176946654130493201
A7AD06E55C6AA2__no


P-1 factor-bounds graph:
B1 = 2500000, B2 = 62500000 (P-1 stage 2)
B1 = 2000000, B2 = 60000000 (P-1 stage 2)
B1 = 2500000 (P-1 stage 1)
B1 = 2000000 (P-1 stage 1)
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
B1 = 200000, B2 = 5000000 (P-1 stage 2)
B1 = 200000, B2 = 4000000 (P-1 stage 2)
B1 = 357496 (P-1 stage 1)
B1 = 200000, B2 = 3000000 (P-1 stage 2)
B1 = 324997 (P-1 stage 1)
B1 = 200000, B2 = 2000000 (P-1 stage 2)
B1 = 244176 (P-1 stage 1)
B1 = 200000, B2 = 1000000 (P-1 stage 2)
B1 = 200000, B2 = 300000 (P-1 stage 2)
B1 = 200000 (P-1 stage 1)
B1 = 100000, B2 = 200000 (P-1 stage 2)
B1 = 100000 (P-1 stage 1)
B1 = 15000, B2 = 243750 (P-1 stage 2)
B1 = 15000 (P-1 stage 1)
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
1011
1012
1013
TF factor-bounds graph:
267
266
265
264
263
262
261
260
258
250
260
270
280
290
2100
Last modified: 2022-05-12T09:15:46+00:00