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Problema: The Fibonacci sequence is defined by the recurrence relation: F n   = F n −1   + F n −2 , where F 1   = 1 and F 2   = 1. Hence the first 12 terms will be: F 1   = 1 F 2   = 1 F 3   = 2 F 4   = 3 F 5   = 5 F 6   = 8 F 7   = 13 F 8   = 21 F 9   = 34 F 10   = 55 F 11   = 89 F 12   = 144 The 12th term, F 12 , is the first term to contain three digits. What is the index of the first term in the Fibonacci sequence to contain 1000 digits? Solución: /*  * To change this license header, choose License Headers in Project Properties.  * To change this template file, choose Tools | Templates  * and open the template in the editor.  */ package projecteuler; import java.math.BigInteger; /**  *  * @author lyonn  */ public class C25 {     public void resultado() {         int i = 1;     ...