New: Download Your Divisor List and Prime Range Scan as a CSV File
The prime factorization calculator's divisor list and range-scan results could already be copied or saved as a .txt file. Now there's a second export option built specifically for spreadsheets: a "Download (.csv)" button sitting right next to it.
Quick answerA "Download (.csv)" button now appears alongside the existing .txt download, in both the divisor list (from the "Is it prime? & Factor" tab) and the prime list produced by "Scan a range." Nothing about the .txt option changed — the CSV button is a second, additional way to save the same numbers.
Up to now, getting a divisor list or a prime range scan out of the calculator meant copying it to the clipboard or saving a plain .txt file. That's fine for pasting into a document or an email, but it leaves a gap for anyone whose next step is a spreadsheet — a .txt file has no defined column structure, so the numbers usually land as one unstructured block of text that then needs to be manually split into cells.
The new CSV download closes that gap directly. Instead of one text blob, the file comes pre-formatted as a header row plus one value per line, which spreadsheet software already knows how to open straight into columns — no "text to columns" step, no delimiter guessing.
Where to find the new button
Quick answerFor a single number's divisors: open the "Is it prime? & Factor" tab, make sure "Show divisor list" is on in the display settings, and calculate — the "Download (.csv)" button sits next to the divisor list. For a range: switch to "Scan a range", run the scan, and the same button appears next to the resulting prime list.
Both buttons live right where the corresponding .txt download already was, so there's no new tab or settings panel to hunt through — it's simply one more action available on results you were already generating.
Example: factoring 60 and downloading its divisors
Take 60 as a worked example (illustrative, not a fixed benchmark). Factoring it gives 60 = 2² × 3 × 5, and with the divisor list turned on, the full set of divisors appears: 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, 60 — twelve divisors total. Clicking "Download (.csv)" now saves a file along the lines of divisors-of-60.csv, with a single "divisor" column header followed by each of those twelve numbers on its own row.
What the CSV file for 60's divisors looks like once opened in a spreadsheet
Row
divisor
1
1
2
2
3
3
4
4
…
…
12
60
Opened in a spreadsheet app, each divisor drops straight into its own cell in column A — ready to sort, filter above or below a value, or run a COUNT formula over, without first pasting a comma-separated line and manually splitting it apart.
Example: scanning a range and downloading the prime list
The same idea applies to a range scan. Suppose (again, just a worked example) someone scans primes from 1 to 200 — that returns 46 primes, from 2 up through 199. Downloading that as CSV now produces a file like prime-numbers-1-200.csv: a "prime" header followed by 46 rows, one prime per line, instead of one paste-in-a-blob of comma-separated digits.
Why it matters here specifically: range scans tend to return far more values than a single number's divisor list — a scan of 1 to 50,000 can return well over 5,000 primes. At that size, having the file already split into one value per row (rather than needing to re-split a giant text blob by hand) is the difference that actually saves time.
The .txt download for the same scan is still there if the destination is a document rather than a spreadsheet — the two export options exist side by side, and which one to reach for just depends on where the numbers are going next.
Test primality, factor a number, scan a prime range, or check if two numbers are coprime — all free and instant.
What's new in the prime factorization calculator's export options?
A "Download (.csv)" button now sits alongside the existing .txt download, for both the divisor list (shown when factoring a number) and the prime list from a range scan. Previously the only file export was plain .txt; CSV is now available as an additional format for the same data.
Where exactly do I find the new CSV download button?
Open the "Is it prime? & Factor" tab, turn on "Show divisor list" in the display settings, and calculate a number — a "Download (.csv)" button appears next to the existing download option under the divisor list. In the "Scan a range" tab, the same "Download (.csv)" button appears next to the prime list once a range scan finishes.
What does the CSV file actually contain for a divisor list?
The downloaded file is named divisors-of-N.csv (where N is the number you factored) and contains one column with a header row, followed by one divisor per line — for example, factoring 60 produces a file with the header "divisor" followed by 1, 2, 3, 4, 5, 6, 10, 12, 15, 20, 30, and 60, each on its own row.
What does the CSV file contain for a range scan?
The file is named prime-numbers-A-B.csv (using the start and end of the range you scanned) and contains a single "prime" column with a header row, followed by every prime found in that range, one per row — ready to be opened directly in a spreadsheet with each prime already sitting in its own cell.
Does the CSV option replace the .txt download?
No — both options are available side by side. The .txt download is still there for pasting a list into a document or email as plain text; the CSV download is the new option specifically for when the destination is a spreadsheet or any tool that expects comma-separated, one-value-per-row data.
Note: The example numbers (60, ranges like 1–200 or 1–50,000) are illustrative, not records of any real case, and are used only to show the shape of the CSV output. This article is for general educational purposes and isn't a substitute for a math course or formal reference — always verify results for anything you depend on with a second method or source.