is 2 1990031 - 1
has 599060 decimal digits
takes 0.131 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
Actual26714.931468.6567%----14.931468.6567%0.0000%
PrimeNet2580.019363.7931%80001400000.00142.4765%0.020764.6898%0.8966%
GPU722620.308766.1290%80001000000.00121.1985%0.310066.5350%0.4059%
Difference+5+14.6227+2.5277%-8000-100000-0.0012-1.1985%+14.6214+2.1217%+2.1217%

Known prime factors (3 factors, 177.3 bits, 0.00890833% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
1990031827852897929.625208
24 × 13
-16163.756e-111.525e-63.104e-6
199003158163721426971821611962.3351461377270680
23 × 5 × 31 × 1178530057
2016-07-273111785300570.58216.121611.433
1990031482559484149552300241099612685.31912124421281617027580
22 × 5 × 3709 × 1258681 × 129854951
2022-06-2712586811298549515,352,2650.78801.2598

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
199003148151005283619596457205704172891.960
19900313994882669280324530076081106040701735114.944
199003128067455408017784248647817749156752671160572145147.654
199003123235724270945839717764064256367437005932767965162
3737
54177.279
P-1 results:
No P-1 results for M1990031


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2016-07-27T14:37:11TJAOIManual testing262263*62.335190.2730.2660.555


ECM factoring results:

Old Calculation Method

Total ECM effort:7.828 GHz-days
Estimated T-Level:4.200
DigitsB1CurvesCompleteFacMiss
201100084 / 1000.84042.989%
255000084 / 2800.30074.042%

New Calculation Method

Total ECM effort:7.828 GHz-days
Estimated T-Level:4.200
DigitsB1CompleteFacMiss
20110003.4013.335%
25500000.31672.889%
302500000.02098.012%


ECM Summary

B1B2factorcurvesGHz-days
500005000000312.620
50000675000070.675
500007050000464.532


Lucas-Lehmer results:
No L-L results for M1990031


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-05T15:45:31Oliver KruseGTX-3
827852897
5816372142697182161
A1BF519322AABC__no
2017-11-12T20:21:01kkmrkkblmbrbkc4.xlarge
827852897
5816372142697182161
A1BF519322AABC__no
2022-07-04T01:35:54Ryan Propperboulder
827852897
5816372142697182161
48255948414955230024109961
CDB04015E4C8CA59no
2022-07-21T06:32:29some-studentsGIMPS_IN_SHANGHAI
827852897
5816372142697182161
48255948414955230024109961
CDB04015E4C8CA59no


P-1 factor-bounds graph:
100
101
102
103
104
105
106
107
100
101
102
103
104
105
106
107
108
109
1010
TF factor-bounds graph:
267
263
220
230
240
250
260
270
280
290
2100
Last modified: 2022-07-21T06:32:29+00:00