is 2 1848503 - 1
has 556455 decimal digits
takes 0.100 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
Actual26716.074668.6567%500000150000000.10155.0747%16.176170.2473%1.5906%
PrimeNet2570.010463.1579%90001600000.00143.0226%0.011764.2715%1.1136%
GPU722610.166265.5738%90001500000.00131.6307%0.167566.1352%0.5614%
Difference+6+15.9084+3.0829%+491000+14850000+0.1002+3.4440%+16.0086+4.1121%+4.1121%

Known prime factors (3 factors, 221.8 bits, 0.01200028% known):
Remaining cofactor is not a probable-prime

P-1GHz-days
exponentfactordigitsbits*kdate foundmin B1min B2min. TFmin. P-1normal P-1
184850342994461300701031651.9331162953517
11 × 71 × 1489057
-7114890570.00020.00640.0119
184850325904396198487687275772271.134700685803552596
22 × 3 × 839 × 4447 × 15649951
2015-08-30444715649951401.770.06740.1253
18485035361994391130430667948130604333098.759145036128995474464146072
23 × 3 × 107 × 1186108723 × 47616413473
2020-10-151186108723476164134734.789e+10292.29381.15

4 Composite Factors:
exponentprime factorscomposite factordigitsbits*
18485031113745559873905747971621516111933043138123.067
1848503230536060344033283533443217486363475426553459946150.692
184850313889922712191142955420257447121197960742986146608
41
52169.892
184850359718974451903038651851124099232740521095861053321
10655778898936623
67221.825
P-1 results:
 GHz-DaysworthFactor
probability
dateuseridcompidb1b2estagefactordigitsbits*spentsaved
2015-08-30T12:32:00alpertronManual testing50000015000000122271.1340.1010.2010.2035.075%


Trial Factoring results:
No TF results for M1848503


ECM factoring results:

Old Calculation Method

Total ECM effort:17.633 GHz-days
Estimated T-Level:24.554
DigitsB1CurvesCompleteFacMiss
2011000255 / 1002.5507.709%
2550000255 / 2800.91140.158%

New Calculation Method

Total ECM effort:17.633 GHz-days
Estimated T-Level:24.554
DigitsB1CompleteFacMiss
20110009.8080.006%
25500000.90740.354%
302500000.05794.437%
3510000000.00399.733%


ECM Summary

B1B2factorcurvesGHz-days
500005000000151.037
50000500000024016.60


Lucas-Lehmer results:
No L-L results for M1848503


PRP results:
dateuseridcompidcofactorsres64PRP
2017-09-30T15:25:04alpertronManual testing
4299446130070103
2590439619848768727577
2D645F6B0C8085__no
2017-10-19T20:55:04Oliver KruseGTX-1
4299446130070103
2590439619848768727577
2D645F6B0C8085__no
2020-10-19T17:17:03LordJuliusBabybox
4299446130070103
2590439619848768727577
536199439113043066794813060433
438C7ECF86D8E741no


P-1 factor-bounds graph:
B1 = 500000, B2 = 15000000 (P-1 stage 2)
B1 = 500000 (P-1 stage 1)
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1010
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TF factor-bounds graph:
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Last modified: 2020-10-19T17:17:03+00:00