HPPRGM (.hpprgm)
.hpprgm file signature | application/octet-stream
HPPRGM is a program file format used by HP Prime graphing calculators, maintained within Hewlett-Packard’s calculator software ecosystem. It stores user-created calculator programs for tasks such as mathematical routines, interactive tools, classroom exercises, and automation on the device. The format is generally considered safe, though like any executable content it should be opened only from trusted sources; it remains associated with the HP Prime platform rather than legacy calculator models.
Magic Bytes
Offset 0
7C 61 8A B2
Sources: Wikipedia
Extension
.hpprgm
MIME Type
application/octet-stream
Byte Offset
0
Risk Level
Safe
Validation Code
How to validate .hpprgm files in Python
def is_hpprgm(file_path: str) -> bool:
"""Check if file is a valid HPPRGM by magic bytes."""
signature = bytes([0x7C, 0x61, 0x8A, 0xB2])
with open(file_path, "rb") as f:
return f.read(4) == signatureHow to validate .hpprgm files in Node.js
function isHPPRGM(buffer: Buffer): boolean {
const signature = Buffer.from([0x7C, 0x61, 0x8A, 0xB2]);
return buffer.subarray(0, 4).equals(signature);
}How to validate .hpprgm files in Go
func IsHPPRGM(data []byte) bool {
signature := []byte{0x7C, 0x61, 0x8A, 0xB2}
if len(data) < 4 {
return false
}
return bytes.Equal(data[:4], signature)
}API Endpoint
/api/v1/hpprgm
curl https://filesignature.org/api/v1/hpprgm
See the full API documentation for all endpoints and parameters.
Related Formats
Frequently Asked Questions
What is a .hpprgm file?
A .hpprgm file is identified by the magic bytes 7C 61 8A B2 at byte offset 0. HPPRGM is a program file format used by HP Prime graphing calculators, maintained within Hewlett-Packard’s calculator software ecosystem. It stores user-created calculator programs for tasks such as mathematical routines, interactive tools, classroom exercises, and automation on the device. The format is generally considered safe, though like any executable content it should be opened only from trusted sources; it remains associated with the HP Prime platform rather than legacy calculator models.
What are the magic bytes for .hpprgm files?
The magic bytes for HPPRGM files are 7C 61 8A B2 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.
How do I validate a .hpprgm file?
To validate a .hpprgm file, read the first bytes of the file and compare them against the known magic bytes (7C 61 8A B2) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.
What is the MIME type for .hpprgm files?
There is no officially registered MIME type for .hpprgm files. Systems typically use application/octet-stream as a generic fallback when handling this format.
Is it safe to open .hpprgm files?
HPPRGM (.hpprgm) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.