Prime numbers with an almost prime reverse

Cécile Dartyge, Joël Rivat, Cathy Swaenepoel

Let $b$ be an integer greater than or equal to $2$. For any integer $n\in \left[b^{\hat{I}»-1},b^{\hat{I}}»-1\right]$, we denote by $R_{\hat{I}}»(n)$ the reverse of $n$ in base $b$, obtained by reversi…