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Old 2020-11-25, 11:34   #881
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2415*288^209272+1 found by KySU (514686 digits)
968*288^235591+1 found by 3DpNKyXhViXrNkzNVoTcy7VQKmKS (579414 digits)
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Old 2020-12-09, 15:35   #882
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53*248^368775+1 found by [SG-FC] dingdong (883016 digits)
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Old 2020-12-14, 17:46   #883
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354*994^166791+1 found by [AF>Amis de la Mer] ComteZera (499940 digits)
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Old 2020-12-22, 17:08   #884
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14056*381^182324+1 found by SystemViper (470569 digits)
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Old 2020-12-30, 20:22   #885
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2416*138^219421+1 found by grcpool.com (469538 digits)
866*138^222803+1 found by KySU (476775 digits)
141*138^244616+1 found by Ralfy (523451 digits)
1789*138^271671+1 found by IDEA (581347 digits)
1019*138^274533+1 found by Neriyah (587471 digits)
2354*138^314727+1 found by eLPeCKo (673482 digits)
2189*138^345010+1 found by KySU (738284 digits)

Last fiddled with by rebirther on 2020-12-30 at 20:24
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Old 2021-01-15, 15:50   #886
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1706*123^339764+1 found by CharityEngine2 (710078 digits)
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Old 2021-01-17, 07:24   #887
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172*107^242649-1 found by grcpool.com (492431 digits)
88*107^273915-1 found by Ralfy (555881 digits)
118*107^314663-1 found by nagasan64 (638575 digits)
116*107^455562-1 found by vaughan (924513 digits)
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Old 2021-01-21, 14:59   #888
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117*412^294963+1 is prime. It is 771300 digits long. It has been a while since I've added one to the Top 5000. This conjecture is down to 2 ks. I'm still searching.
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Old 2021-02-11, 15:56   #889
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838*367^198905+1 found by KySU (510128 digits)
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Old 2021-02-11, 16:45   #890
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2707*352^224386+1 found by KySU (571412 digits)
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Old 2021-02-12, 13:18   #891
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Big news from PrimeGrid:

9221*2^11392194-1 is prime!!

See: https://primes.utm.edu/primes/page.php?id=131777

This was the 2nd smallest k remaining on the Riesel base 2 effort. Only k=2293 remaining is smaller.

Even better news: It knocks out the same CRUS k remaining for both R2 and R4! It is also far bigger than the previous largest R4 prime. :-)

A hearty congrats to PrimeGrid!
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