Hey all,
Maybe I'm just more of a "numberphile" and see a lot of meaning and pattern in numbers, but when I take a look at some of my Amex card numbers I can't help but see a lot of connections and I'm curious if other people have similar things going on with their cards. I'm not just talking about the Amex identifiers, i.e. all numbers start with a 3 and all are 15 digits long broken into 4|6|5 fragments
But for instance, the last 5 digits on 3 of my cards are anagrams/permutations of each other. There's also a certain degree of succession in the 3 Platinum, Gold and Green charge cards (which I applied for in that order), meaning the first 4 digits go something like "3233", "3234", "3235" and the last 5 go something like "24001", "35002", "46003" (these are not the actual numbers lol). My Delta Reserve personal and business also have eerily similar numbers. And there are more that I could go on about.
Just wondering if other people have noticed patterns like these too or if I'm just a little crazy 
I honestly look more at the $Numbers I have to pay
In the Fibonacci sequence, when it is translated it means
"Spend a Lot" 
@mkhan1093 wrote:Just wondering if other people have noticed patterns like these too or if I'm just a little crazy
I don't know about crazy, but you must be retired to have the time.
@Kforce wrote:
@mkhan1093 wrote:Just wondering if other people have noticed patterns like these too or if I'm just a little crazy
I don't know about crazy, but you must be retired to have the time.
On the contrary I'm mid-20s haha, but I'm pretty good at memorizing my card numbers just by typing them into online things a couple of times so it doesn't take long to notice these things
There's redundancies because it's attached to you and your account.
The first digit in your credit-card number signifies the system:
- 3 - travel/entertainment cards (such as American Express and Diners Club)
- 4 - Visa
- 5 - MasterCard
- 6 - Discover Card
The structure of the card number varies by system. For example, American Express card numbers start with 37; Carte Blanche and Diners Club with 38.
- American Express - Digits three and four are type and currency, digits five through 11 are the account number, digits 12 through 14 are the card number within the account and digit 15 is a check digit.
- Visa - Digits two through six are the bank number, digits seven through 12 or seven through 15 are the account number and digit 13 or 16 is a check digit.
- MasterCard - Digits two and three, two through four, two through five or two through six are the bank number (depending on whether digit two is a 1, 2, 3 or other). The digits after the bank number up through digit 15 are the account number, and digit 16 is a check digit.
@mkhan1093 wrote:
@Kforce wrote:
@mkhan1093 wrote:Just wondering if other people have noticed patterns like these too or if I'm just a little crazy
I don't know about crazy, but you must be retired to have the time.
On the contrary I'm mid-20s haha, but I'm pretty good at memorizing my card numbers just by typing them into online things a couple of times so it doesn't take long to notice these things
You understand Illuminati are gonna come after you now?
@Brian_Earl_Spilner wrote:There's redundancies because it's attached to you and your account.
The first digit in your credit-card number signifies the system:
- 3 - travel/entertainment cards (such as American Express and Diners Club)
- 4 - Visa
- 5 - MasterCard
- 6 - Discover Card
The structure of the card number varies by system. For example, American Express card numbers start with 37; Carte Blanche and Diners Club with 38.
- American Express - Digits three and four are type and currency, digits five through 11 are the account number, digits 12 through 14 are the card number within the account and digit 15 is a check digit.
- Visa - Digits two through six are the bank number, digits seven through 12 or seven through 15 are the account number and digit 13 or 16 is a check digit.
- MasterCard - Digits two and three, two through four, two through five or two through six are the bank number (depending on whether digit two is a 1, 2, 3 or other). The digits after the bank number up through digit 15 are the account number, and digit 16 is a check digit.
Some Mastercard accounts have also been issued with account numbers beginning with 2 in recent years as they ran out of BINs to assign to issuing banks.
@K-in-Boston wrote:
@Brian_Earl_Spilner wrote:There's redundancies because it's attached to you and your account.
The first digit in your credit-card number signifies the system:
- 3 - travel/entertainment cards (such as American Express and Diners Club)
- 4 - Visa
- 5 - MasterCard
- 6 - Discover Card
The structure of the card number varies by system. For example, American Express card numbers start with 37; Carte Blanche and Diners Club with 38.
- American Express - Digits three and four are type and currency, digits five through 11 are the account number, digits 12 through 14 are the card number within the account and digit 15 is a check digit.
- Visa - Digits two through six are the bank number, digits seven through 12 or seven through 15 are the account number and digit 13 or 16 is a check digit.
- MasterCard - Digits two and three, two through four, two through five or two through six are the bank number (depending on whether digit two is a 1, 2, 3 or other). The digits after the bank number up through digit 15 are the account number, and digit 16 is a check digit.
Some Mastercard accounts have also been issued with account numbers beginning with 2 in recent years as they ran out of BINs to assign to issuing banks.
Um, that was a trade secret and you just violated your NDA. I'll expect you in my office before the end of the day. Please don't make me call myfico security.