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## Chemistry-related numbers Edit

• The number of possible isotopical isomers of Mirex is (2^22+2^12+2^11+2^11)/4, which amounts to 1,050,624.
• Its prime factorization is 211 × 33 × 19.
• The number of possible isotopical isomers of 2,3,7,8-Tetrachlorodibenzofuran is (2^20*3+2^10*3)/2, which amounts to 1,574,400.
• Its prime factorization is 29 × 3 × 52 × 41.
• On July 10, 1976, the most poisonous chemical substance (namely, 2,3,7,8-Tetrachlorodibenzo-p-dioxin) was the cause of the Seveso disaster. The number of possible isotopical isomers of this substance is (2^20*3^2+2^10*3^2+2^10*3+2^10*3)/4, which amounts to 2,363,136.
• Its prime factorization is 28 × 3 × 17 × 181.
• The number of possible isotopical isomers of DDT is ((2^11+2^7)/2)^2*(2^6+2^4+2^4)/3, which amounts to 37,879,808.
• Its prime factorization is 217 × 172.
• The number of possible isotopical isomers of o,p' -DDT is 2*2^11*(2^11+2^7)/2*(2^6+2^4+2^4)/3, which amounts to 142,606,336.
• Its prime factorization is 223 × 17.

## Approximations of these numbers Edit

Approximations of 299,792,458
Notation Approximation
Scientific notation $$2.99792458*10^8$$ (exact)
Arrow notation $$7 \uparrow 10<n<26 \uparrow 6$$
Arrow notation (more precise) $$669 \uparrow 3<n<670 \uparrow 3$$
Arrow notation (more precise) $$17,314 \uparrow 2<n<17,315 \uparrow 2$$
Hyper-E notation $$3E8$$
Factorial $$12!$$
Fast-growing hierarchy $$f_2(27)$$
Hardy hierarchy $$H_{\omega 18}(24)$$
Slow-growing hierarchy $$g_{\omega^8 3}(10)$$
Notation Array Notation $$(10\{1,3\}8)$$

## Sources Edit

1. Definition of Second