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Platinum Coins
Platinum coins are a form of currency. Platinum has an international currency symbol under ISO 4217 of XPT. The issues of legitimate platinum coins were initiated by Spain in Spanish-colonized America in the 18th century and continued by the Russian Empire in the 19th century. As a form of currency, these coins proved to be impractical: platinum resembles many less expensive metals, and, unlike the more malleable and ductile silver and gold, it is very difficult to work. Several commemorative coin sets have been issued starting from 1978 and became popular among coin collectors. The major platinum bullion coins include the American Platinum Eagle, the Canadian Platinum Maple Leaf, the Australian Platinum Koala, the Isle of Man Noble (Manx coin), Noble, the Chinese Platinum Panda, the Vienna Philharmonic (coin), Austrian Vienna Philharmonic and several series by the Soviet Union and later by the Russia, Russian Federation. History Platinum was first used for minting coins in Spani ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
2005 AEPlat Proof Obv
5 (five) is a number, numeral (linguistics), numeral and numerical digit, digit. It is the natural number, and cardinal number, following 4 and preceding 6, and is a prime number. It has attained significance throughout history in part because typical humans have five Digit (anatomy), digits on each hand. In mathematics 5 is the third smallest prime number, and the second super-prime. It is the first safe prime, the first good prime, the first balanced prime, and the first of three known Wilson primes. Five is the second Fermat prime and the third Mersenne prime exponent, as well as the third Catalan number, and the third Sophie Germain prime. Notably, 5 is equal to the sum of the ''only'' consecutive primes, 2 + 3, and is the only number that is part of more than one pair of twin primes, (3, 5) and (5, 7). It is also a sexy prime with the fifth prime number and first Repunit#Decimal repunit primes, prime repunit, 11 (number), 11. Five is the third factorial prime, an alternat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
