[throwawaytemp27]

I wonder if you gave away your phone number there? Or how many 7 digit numbers match those criteria?

[YeGoblynQueenne]

There can't be a better way to get a date with a number theory nerd.

[genewitch]

7 digits is barely a phone number in most of the United States anymore, most places outside of rural areas require 10 digit dialing and hide it behind carrier dial plans - I mean in the way a rural person can dial one, two, or three digits because all land lines in an area have the same area code, prefix, and possibly additional digits in common.

[michaelcampbell]

My phone number is already "out" in terms of being on the internet, and I can change it pretty easily if it became an ACTUAL security issue.

But it would be an interesting exercise to do, I guess.

[londons_explore]

Doubt it. OP effectively have us 5+4 bits of entropy, whereas a 7 digit phone number probably has 23 bits.