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Old 2021-08-06, 12:20   #8
sweety439
 
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"99(4^34019)99 palind"
Nov 2016
(P^81993)SZ base 36

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Another 3 k's eliminated:

90527 (90527*2^9162167+1)
258317 (258317*2^5450519+1)
265711 (265711*2^4858008+1)

Now only 7 primes > 78557 remain:

79309, 79817, 152267, 156511, 222113, 225931, 237019
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