Twin Carmichael numbers conjecture
Two Carmichael numbers are twin Carmichael numbers if no weak Carmichael number lies strictly between them. Twin Carmichael numbers conjecture. There are infinitely many pairs of twin Carmichael numbers. The source notes that this follows immediately from the preceding asymptotic equality conjecture if that conjecture holds.
References
Primary source
Romeo Meštrović, “Generalizations of Carmichael numbers I”, arXiv:1305.1867 (2013).
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