Hello I would like to know if it was possible to generate a bitcoin address with some letters only, I explain myself
ex: 15nE3ebnYkJYRok2H9H9Xdw1widwPtYt7TD4
1E3en5widwbn..........
1onbwE53................
with certain letter only
You are looking for Bitcoin Vanity Address.
I can't do it precisely if I remove letters from the base58 bitcoin addresses are invalid
If you want the address only start with certain characters, that's what Vanity Generators do, you can check here:
https://bitcointalk.org/index.php?topic=25804.0Actually you can make more complex rules, but more complex the rule is, more computing power and time are necessary. And for some rules you may have to code yourself.
no pattern but address with certain letter or base 58 - 10 characters