(11111)5
Explanation:
Given number is in base 5.
∴ (111111)5 = 1 × 54 + 1 × 53 + 1 × 52 + 1 × 51 + 1 × 50.
= 625 + 125 + 25 + 5 + 1 = 781
Hence, 781.
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