115
Moscovium is element 115, and the subject of a well-known UFO claim.
- Odd
- Composite
Where 115 fits
Why 115 is special
Bob Lazar claimed in 1989 that element 115 powered alien craft, years before any atom of it was made. The real element was first synthesised in 2003, survives well under a second, and has no such properties — but the claim is why the number is recognised outside chemistry.
Factors & digit properties
- Divisors (4)
- 1, 5, 23, 115
- Prime factorisation
- 5 × 23
- Digit sum
- 7
- Digital root
- 7
Representations
- Decimal
- 115
- Binary
- 1110011
- Octal
- 163
- Hexadecimal
- 73
- Roman numeral
- CXV
- Scientific notation
- 1.150 × 10^2
Other mathematical patterns
- Deficient number
- Semiprime
- Lucky number (mathematical sieve)
Related numbers & connections
Nihonium and moscovium were confirmed together in 2016, the products of separate Japanese and Russian-American programmes running in parallel for a decade.
View 113 →Numbers Around Us
- appears alongside113
why?
Strength 0.50, confidence "high".
Culture
Bob Lazar said in 1989 that element 115 fuelled alien spacecraft. No atom of it existed until 2003, and the isotopes made since decay in well under a second. The claim is recorded here because it is why the number is known outside chemistry, not because there is evidence for it.
DocumentedCultureCulture: American UFO subculture
Common questions
Is 115 a prime number?
No, 115 is not prime.
What are the factors of 115?
The factors of 115 are 1, 5, 23, 115.
What is 115 in Roman numerals?
115 in Roman numerals is CXV.
About this page's data
Mathematical facts:computed directly from the number's value — nothing to source or verify externally.
Contextual records: 1 reviewer-confirmed record, sourced and reviewed before publication.
Last reviewed: 3 August 2026