Nombres presque premiers dont lʹécriture en base r ne comporte pas certains chiffres Original Research Article

The aim of this work is to study the multiplicative properties of integers with missing digits. In particular we prove that if we fix a set imagesubset of{0, 1, …, r−1} of digits, imagegreater-or-equal, slanted2, there are infinitely many almost primes whose digits in base r belong to image.