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The Fibonaxix, coined by SuperJedi224, is equal to 4181, the 19th term in the fibonacci sequence (XIX being the Roman numeral for 19), starting from the first one. It is the first composite Fibonacci number with prime index.

Its prime factorization is 37 × 113.

Sources

Source: Naming Large Fibonacci Numbers

See also

Fibonacci Numbers by SuperJedi224

Numbers By SuperJedi224

Fibonacci Numbers

Pound-Star Notation