Study extends Willans’ formula for predicting prime numbers, suggesting new mathematical insights.
61 years ago, Willans proposed an explicit formula for the nth prime, p(n) [1]. Based on Wilson’s theorem—that (p−1)!+1p∈Z iff p is prime or 1—Willans observed that cos 2(πx)=1 when x∈Z, and lies ...
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Foo Jun Han (2026) studied this question.
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