My main idea is to use the Big Integer formed by "957496696762772407663" and a 27-digit number ,as the seed of a BIP-39 HD cold wallet. The next step is the 27-digit number : In the hits says is formed by some words from Satoshis portrait: Each word is caged in a closed maze except the "First 21-digit prime found in consecutive digits of e" expresion which leads out . The list i understand is: BTC/Bitcoin , ETH/Ethereum,XRP/Ripple,Phemex. so the words are pretty clear , i permuted them to get all combinations in words_combinations.py . The next question is:How to transform them in a 27-digit number, without I/O? Ive taked several approaches as : Use of an encoding string of all posible letters and assign the position on the string as the integer. Use Ascii encoding , leads to long string as lowercase values take a 3-digit number.