is 2 1939351 - 1
has 583803 decimal digits
takes 0.105 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
Actual26715.321668.6567%500000150000000.10155.1041%15.423170.2565%1.5998%
PrimeNet2580.019863.7931%80001400000.00122.4641%0.021064.6853%0.8922%
GPU722620.316866.1290%8000900000.00101.1518%0.317866.5191%0.3901%
Difference+5+15.0048+2.5277%+492000+14910000+0.1005+3.9524%+15.1053+3.7374%+3.7374%

Known prime factors (4 factors, 210.2 bits, 0.01083883% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
19393511485077421771237.11238288
24 × 2393
-1623931.215e-81.145e-51.918e-5
1939351288180111492171444.7127429808
24 × 421 × 1103
2014-01-1042111031.430e-63.604e-56.740e-5
1939351105510190277023431753.2282720244821
7 × 5897 × 65899
2014-09-115897658990.00100.00070.0009
1939351419438369130025620655032375.15110813884880303401
3 × 13 × 13399 × 32563 × 635507
2015-09-22325636355075,500.80.00510.0052

11 Composite Factors:
exponentprime factorscomposite factordigitsbits*
193935142796977698018297114254092581.824
193935115669080134706407749428207112890.340
19393513040593839759268315564335154313097.940
1939351622898451819032006616416010982003134112.263
1939351120873795979984738927935147826116115137119.863
193935144255022136393393630185953177435257352939128.379
19393514515517260199438707539933613526869903328741135.052
193935117950694529350872661104448316337234048535656572748156.975
19393516572213417468937829877729619041549133074116703263350165.491
193935112753417213354299560882417480282715734610598783276
793
53173.091
193935118939811953965341205419503697743035293849319595984
59874071398361
64210.203
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-09-22T14:35:00alpertronManual testing50000015000000122375.1510.1010.2100.2035.104%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2014-01-10T14:40:00TJAOIManual testing??44.712142.21810e-70.2334.91950e-7
2014-09-11T11:39:00TJAOIManual testing253254*53.228170.0000.2320.001


ECM factoring results:

Old Calculation Method

Total ECM effort:19.354 GHz-days
Estimated T-Level:24.464
DigitsB1CurvesCompleteFacMiss
2011000250 / 1002.5008.106%
2550000250 / 2800.89340.883%

New Calculation Method

Total ECM effort:19.354 GHz-days
Estimated T-Level:24.464
DigitsB1CompleteFacMiss
201100010.3140.003%
25500000.95038.688%
302500000.06094.150%
3510000000.00399.717%


ECM Summary

B1B2factorcurvesGHz-days
500005000000322.225
50000660000021116.56
50000715000070.571


Lucas-Lehmer results:
No L-L results for M1939351


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T02:45:12Oliver KruseGTX-1
148507742177
28818011149217
10551019027702343
41943836913002562065503
5EA6A1FE6BA288FEno
2017-10-05T21:20:42Oliver KruseManual testing
148507742177
28818011149217
10551019027702343
41943836913002562065503
5EA6A1FE6BA288__no
2017-11-15T13:00:40kkmrkkblmbrbkc4.xlarge
148507742177
28818011149217
10551019027702343
41943836913002562065503
5EA6A1FE6BA288__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
100
101
102
103
104
105
106
100
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
254
2
230
240
250
260
270
280
290
2100
Last modified: 2022-03-10T10:41:57+00:00