exists and is an alternate of . 1 microgram is 0.000001 gram or 1 gram is 1000000 micrograms. Scroll down to related links and look at Weight and mass conversion.
Report Abuse. The major Credit cards (Visa Mastercard) almost always have 16 digits. The number will be less than 16 if the card is from a department store or gas station. CupCake Â· 8 years ago.
Visa: ^4[0-9]{6,}$ Visa card numbers start with a 4. MasterCard: ^5[1-5][0-9]{5,}$ MasterCard numbers start with the numbers 51 through 55, but this will only detect MasterCard credit cards; there are other cards issued using the MasterCard system that do not fall into this IIN range.American Express: ^3[47][0-9]{5,}$ American Express card numbers start with 34 or 37.asterCard: ^5[1-5][0-9]{5,}$ MasterCard numbers start with the numbers 51 through 55, but this will only detect MasterCard credit cards; there are other cards issued using the MasterCard system that do not fall into this IIN range.