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arXiv · 2211.09641

Primes in arithmetic progressions to large moduli, and shifted primes without large prime factors

Jared Duker Lichtman
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Abstract

We prove the infinitude of shifted primes $p-1$ without prime factors above $p^{0.2844}$. This refines $p^{0.2961}$ from Baker and Harman in 1998. Consequently, we obtain an improved lower bound on the the distribution of Carmichael numbers. Our main technical result is a new mean value theorem for primes in arithmetic progressions to large moduli. Namely, we estimate primes of size $x$ with quadrilinear forms of moduli up to $x^{17/32}$. This extends moduli beyond $x^{11/21}$, recently obtained by Maynard, improving $x^{29/56}$ from well-known 1986 work of Bombieri, Friedlander, and Iwaniec.

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Jared Duker Lichtman. 2022-11-14. Primes in arithmetic progressions to large moduli, and shifted primes without large prime factors. https://arxiv.org/abs/2211.09641

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