is 2 1904249 - 1
has 573237 decimal digits
takes 0.103 GHz-days to do one PRP test
Last-known PrimeNet details:
Exponent is not assigned to anyone
0 primality tests remaining
ResidueStatus
L-L3C5FDE699BDF20BAdouble-checked
PRP-unknown--unknown-

 Trial FactoringP-1 FactoringCombined
LimitGHz-daysProbabilityB1B2GHz-daysProbabilityGHz-daysProbabilityProb over default TF
Actual26715.604068.6567%500000150000000.10155.0929%15.705570.2530%1.5963%
PrimeNet2570.010163.1579%90001600000.00143.0393%0.011464.2776%1.1197%
GPU722610.161365.5738%100001600000.00141.7281%0.162766.1687%0.5949%
Difference+6+15.4427+3.0829%+490000+14840000+0.1000+3.3648%+15.5427+4.0843%+4.0843%

Known prime factors (1 factor, 72.1 bits, 0.00378848% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
190424952108340812083410228412272.1421368212371703580
22 × 3 × 5 × 13 × 31 × 101 × 223 × 2512297
2010-11-272232512297554.400.01080.0201

P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2016-03-16T12:40:59alpertronManual testing5000001500000012-
skipped known factor: 5210834081208341022841
--0.101--5.093%


Trial Factoring results:
 BitsFactorGHz-Daysworth
dateuseridcompidfromtofactorbits*digitsspentsaved
2002-01-02T00:00:00Jocelyn Larouchev4_computers21258--0.020--
2022-03-08T23:25:32LordJuliusManual testing258260--0.060--
2022-03-09T05:13:24LordJuliusManual testing21260--0.081--
2009-05-23T17:55:00Architects Cubedm1_tt260261--0.081--


ECM factoring results:

Old Calculation Method

Total ECM effort:19.723 GHz-days
Estimated T-Level:24.536
DigitsB1CurvesCompleteFacMiss
2011000254 / 1002.5407.786%
2550000254 / 2800.90740.302%

New Calculation Method

Total ECM effort:19.723 GHz-days
Estimated T-Level:24.536
DigitsB1CompleteFacMiss
20110008.7140.016%
25500000.79045.367%
302500000.04995.226%
3510000000.00299.775%


ECM Summary

B1B2factorcurvesGHz-days
10.00000e+0
500005000000201.388
50000660000021316.67
500006750000211.661


Lucas-Lehmer results:
dateuseridcompidres64spent (GHz-days)
1999-01-02T00:00:00curtiscv4_computers3C5FDE699BDF20BA0.103


PRP results:
dateuseridcompidcofactorsres64PRP
2017-10-04T19:27:29Oliver KruseGTX-2
5210834081208341022841
58A747F166A3CF__no
2017-11-15T09:29:45kkmrkkblmbrbkc4.xlarge
5210834081208341022841
58A747F166A3CF__no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
101
102
103
104
105
106
101
102
103
104
105
106
107
108
TF factor-bounds graph:
267
261
260
258
250
260
270
280
290
2100
Last modified: 2022-03-09T05:13:24+00:00