is 2 1479773 - 1
has 445457 decimal digits
takes 0.056 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
-unknown- primality tests remaining
ResidueStatus
L-L-unknown--unknown-
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26720.080168.6567%500000150000000.07144.9403%20.151570.2052%1.5484%
PrimeNet2560.006562.5000%70001200000.00072.9154%0.007263.5933%1.0933%
GPU722600.103865.0000%70001000000.00071.4868%0.104565.5204%0.5204%
Difference+7+19.9763+3.6567%+493000+14900000+0.0707+3.4535%+20.0470+4.6848%+4.6848%

Known prime factors (3 factors, 205.4 bits, 0.01388216% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1479773305513933591134.83110323
32 × 31 × 37
-31371.909e-91.734e-63.493e-6
147977375974231541063428130757512582.6522567090747738451375
34 × 53 × 7 × 23 × 255217 × 6170363
2015-02-2025521761703631,188,4180.03200.0348
14797732973355574058355909243444092787.942100466611232207774748
22 × 3 × 1702879 × 4916507633651
2018-10-041702879491650763365122,776,35814,83027,697

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
147977323211186329587735539917987746533760936117.482
1479773908401557392320874041185644855137983137122.773
147977322589840483742109928078694803705074924819925303261
59
52170.594
147977369015110253586804472535140405530303465274089018094
220176578081
62205.425
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-02-20T20:45:00alpertronManual testing50000015000000122582.6520.0710.1130.1434.940%


Trial Factoring results:
No TF results for M1479773


ECM factoring results:

Old Calculation Method

Total ECM effort:26.542 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:26.542 GHz-days
Estimated T-Level:25.391
DigitsB1CompleteFacMiss
201100012.2630.000%
25500001.39024.916%
302500000.11689.004%
3510000000.00899.198%


ECM Summary

B1B2factorcurvesGHz-days
50000500000024911.83
50000500000020.095
250000400000005014.62


Lucas-Lehmer results:
No L-L results for M1479773


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-01T06:14:23Oliver KruseGTX-2
30551393359
7597423154106342813075751
43A433CEB219F2__no
2017-10-28T12:42:24kkmrkkblmbrbkold
30551393359
7597423154106342813075751
43A433CEB219F2__no
2018-10-08T01:16:50Oliver KruseGTX-1
30551393359
7597423154106342813075751
297335557405835590924344409
00673990B1FE2F__no
2018-10-08T01:56:06ATHec2-PRPCFDC
30551393359
7597423154106342813075751
297335557405835590924344409
00673990B1FE2F__no
2018-10-08T13:05:27-Anonymous-
30551393359
7597423154106342813075751
297335557405835590924344409
00673990B1FE2F__no
2018-10-08T13:16:21-Anonymous-
30551393359
7597423154106342813075751
297335557405835590924344409
00673990B1FE2F__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
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102
103
104
105
106
107
100
101
102
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104
105
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109
1010
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1013
TF factor-bounds graph:
267
230
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250
260
270
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2100
Last modified: 2022-04-07T09:47:34+00:00