CTF--Project_Euler--25-1000-digit_Fibonacci_number.txt

### 25-1000-digit Fibonacci number
#!/bin/python3
"""What is the index of the first term in the Fibonacci sequence to contain 1000 digits?"""

def fibo(n):
	fibos = [1, 1]
	x = 0
	while len(fibos) < n:
		fibos.append(fibos[-1] + fibos[-2])
		x += 1
	return fibos

num = 1
result = fibo(num)

while (len(str(result[-1]))) < 1000:
	num += 1
	result = fibo(num)

answer = result[-1]
print('Index number : ' + str(result.index(answer) + 1))